Provided by: swish-e_2.4.7-3ubuntu2_amd64 bug

NAME

       SWISH-CONFIG - Configuration File Directives

OVERVIEW

       This document lists the available configuration directives available in Swish-e.

CONFIGURATION FILE

       What files Swish-e indexes and how they are indexed, and where the index is written can be
       controlled by a configuration file.

       The configuration file is a text file composed of comments, blank lines, and configuration
       directives.  The order of the directives is not important.  Some directives may be used
       more than once in the configuration file, while others can only be used once (e.g.
       additional directives will overwrite preceding directives).  Case of the directive is not
       important -- you may use upper, lower, or mixed case.

       Comments are any line that begin with a "#".

           # This is a comment

       As of 2.4.3 lines may be continued by placing a backslas as the last character on the
       line:

           IgnoreWords \
               am \
               the \
               foo

       Directives may take more than one parameter.  Enclose single parameters that include
       whitespace in quotes (single or double).  Inside of quotes the backslash escapes the next
       character.

           ReplaceRules append "foo bar"   <- define "foo bar" as a single parameter

       If you need to include a quote character in the value either use a backslash to escape it,
       or enclose it in quotes of the other type.

       Backslashes also have special meaning in regular expressions.

           FileFilterMatch pdftotext "'%p' -" /\.pdf$/

       This says that the dot is a real dot (instead of matching any character).  If you place
       the regular expression in quotes then you must use double-backslashes.

           FileFilterMatch pdftotext "'%p' -" "/\\.pdf$/"

       Swish-e will convert the double backslash into a single backslash before passing the
       parameter to the regular expression compiler.

       Commented example configuration files are included in the conf directory of the Swish-e
       distribution.

       Some command line arguments can override directives specified in the configuration file.
       Please see also the SWISH-RUN for instructions on running Swish-e, and the SWISH-SEARCH
       page for information and examples on how to search your index.

       The configuration file is specified to Swish-e by the "-c" switch.  For example,

           swish-e -c myconfig.conf

       You may also split your directives up into different configuration files.  This allows you
       to have a master configuration file used for many different indexes, and smaller
       configuration files for each separate index.  You can specify the different configuration
       files when running from the command line with the "-c" switch (see SWISH-RUN), or you may
       include other Configuration file with the IncludeConfigFile directive below.

       Typically, in a configuration file the directives are grouped together in some logical
       order -- that is, directives that control the source of the documents would be grouped
       together first, and directives that control how each document is filtered or its words
       index in another group of directives. (The directives listed below are grouped in this
       order).

       The configuration file directives are listed below in these groups:

       •   "Administrative Headers Directives" -- You may add administrative information to the
           header of the index file.

       •   "Document Source Directives" -- Directives for selecting the source documents and the
           location of the index file.

       •   "Document Contents Directives" -- Directives that control how a document content is
           indexed.

       •   "Directives for the File Access method only" -- These directives are only applicable
           to the File Access indexing method.

       •   "Directives for the HTTP Access Method Only" -- Likewise, these only apply to the HTTP
           Access method.

       •   "Directives for the prog Access Method Only" -- These only apply to the prog Access
           method.

       •   "Document Filter Directives" -- This is a special section that describes using
           document filters with Swish-e.

       Alphabetical Listing of Directives

       •   AbsoluteLinks [yes⎪NO]

       •   BeginCharacters *string of characters*

       •   BumpPositionCounterCharacters *string*

       •   Buzzwords [*list of buzzwords*⎪File: path]

       •   CompressPositions  [yes⎪NO]

       •   ConvertHTMLEntities [YES⎪no]

       •   DefaultContents [TXT⎪HTML⎪XML⎪TXT2⎪HTML2⎪XML2⎪TXT*⎪HTML*⎪XML*]

       •   Delay *seconds*

       •   DontBumpPositionOnEndTags *list of names*

       •   DontBumpPositionOnStartTags *list of names*

       •   EnableAltSearchSyntax  [yes⎪NO]

       •   EndCharacters *string of characters*

       •   EquivalentServer *server alias*

       •   ExtractPath *metaname* [replace⎪remove⎪prepend⎪append⎪regex]

       •   FileFilter *suffix* *program* [options]

       •   FileFilterMatch *program* *options* *regex* [*regex* ...]

       •   FileInfoCompression [yes⎪NO]

       •   FileMatch [contains⎪is⎪regex] *regular expression*

       •   FileRules [contains⎪is⎪regex] *regular expression*

       •   FuzzyIndexingMode [NONE⎪Stemming⎪Soundex⎪Metaphone⎪DoubleMetaphone]

       •   FollowSymLinks [yes⎪NO]

       •   HTMLLinksMetaName *metaname*

       •   IgnoreFirstChar *string of characters*

       •   IgnoreLastChar *string of characters*

       •   IgnoreLimit *integer integer*

       •   IgnoreMetaTags *list of names*

       •   IgnoreNumberChars *list of characters*

       •   IgnoreTotalWordCountWhenRanking [YES⎪no]

       •   IgnoreWords [*list of stop words*⎪File: path]

       •   ImageLinksMetaName *metaname*

       •   IncludeConfigFile

       •   IndexAdmin *text*

       •   IndexAltTagMetaName *tagname*⎪as-text

       •   IndexComments [yes⎪NO]

       •   IndexContents [TXT⎪HTML⎪XML⎪TXT2⎪HTML2⎪XML2⎪TXT*⎪HTML*⎪XML*]  *file extensions*

       •   IndexDescription *text*

       •   IndexDir [URL⎪directories or files]

       •   IndexFile *path*

       •   IndexName *text*

       •   IndexOnly *list of file suffixes*

       •   IndexPointer *text*

       •   IndexReport [0⎪1⎪2⎪3]

       •   MaxDepth *integer*

       •   MaxWordLimit *integer*

       •   MetaNameAlias *meta name* *list of aliases*

       •   MetaNames *list of names*

       •   MinWordLimit *integer*

       •   NoContents *list of file suffixes*

       •   obeyRobotsNoIndex [yes⎪NO]

       •   ParserWarnLevel [0⎪1⎪2⎪3]

       •   PreSortedIndex *list of property names*

       •   PropCompressionLevel [0-9]

       •   PropertyNameAlias *property name* *list of aliases*

       •   PropertyNames *list of meta names*

       •   PropertyNamesCompareCase *list of meta names*

       •   PropertyNamesIgnoreCase *list of meta names*

       •   PropertyNamesNoStripChars *list of meta names*

       •   PropertyNamesDate *list of meta names*

       •   PropertyNamesNumeric *list of meta names*

       •   PropertyNamesMaxLength integer *list of meta names*

       •   PropertyNamesSortKeyLength integer *list of meta names*

       •   ReplaceRules [replace⎪remove⎪prepend⎪append⎪regex]

       •   ResultExtFormatName  name -x format string

       •   SpiderDirectory *path*

       •   StoreDescription [XML <tag>⎪HTML <meta>⎪TXT size]

       •   "SwishProgParameters *list of parameters*

       •   SwishSearchDefaultRule   [<AND-WORD>⎪<or-word>]

       •   TmpDir *path*

       •   TranslateCharacters [*string1 string2*⎪:ascii7:]

       •   TruncateDocSize *number of characters*

       •   UndefinedMetaTags [error⎪ignore⎪INDEX⎪auto]

       •   UndefinedXMLAttributes [DISABLE⎪error⎪ignore⎪index⎪auto]

       •   UseStemming [yes⎪NO]

       •   UseSoundex [yes⎪NO]

       •   UseWords [*list of words*⎪File: path]

       •   WordCharacters *string of characters*

       •   XMLClassAttributes *list of XML attribute names*

       Directives that Control Swish

       These configuration directives control the general behavior of Swish-e.

       IncludeConfigFile *path to config file*
           This directive can be used to include configuration directives located in another
           file.

               IncludeConfigFile /usr/local/swish/conf/site_config.config

       IndexReport [0⎪1⎪2⎪3]
           This is how detailed you want reporting while indexing. You can specify numbers 0 to
           3.  0 is totally silent, 3 is the most verbose.   The default is 1.

           This may be overridden from the command line via the "-v" switch (see SWISH-RUN).

       ParserWarnLevel [0⎪1⎪2⎪3]
           Sets the error level when using the libxml2 parser for XML and HTML.  libxml2 will
           point out structural errors in your documents.

               0 = no report
               1 = fatal errors
               2 = errors
               3 = warnings

           Currently (as of 2.4.4 - early 2005) libxml2 only reports errors at level 2.  The
           default as of 2.4.4 is "2" which should report any errors that might indicate a
           problem parsing a document.

           The exception to this is UTF-8 to Latin-1 conversion errors are reported at level 3
           (changed from 1 in 2.4.4).  Although these errors indicate a problem indexing text,
           they are only reported at level 3 because they can be very common.

           It is recommended that you index at ParserWarnLevel 3 when first starting out to see
           what errors and warnings are reported.  Then reduce the level when you understand what
           documents are causing parsing problems and why.

       IndexFile *path*
           Index file specifies the location of the generated index file.  If not specified,
           Swish-e will create the file index.swish-e in the current directory.

               IndexFile /usr/local/swish/site.index

       obeyRobotsNoIndex [yes⎪NO]
           When enabled, Swish-e will not index any HTML file that contains:

               <meta name="robots" content="noindex">

           The default is to ignore these meta tags and index the document.  This tag is
           described at http://www.robotstxt.org/wc/exclusion.html.

           Note: This feature is only available with the libxml2 HTML parser.

           Also, if you are using the libxml2 parser (HTML2 and XML2) then you can use the
           following comments in your documents to prevent indexing:

                  <!-- SwishCommand noindex -->
                  <!-- SwishCommand index -->

           and/or these may be used also:

                  <!-- noindex -->
                  <!-- index -->

           For example, these are very helpful to prevent indexing of common headers, footers,
           and menus.

       NOTE: This following items are currently not available.  These items require Swish-e to
       parse the configuration file while searching.

       EnableAltSearchSyntax [yes⎪NO]
           NOTE: This following item is currently not available.

           Enable alternate search syntax.  Allows the usage of a basic "Altavista(c)",
           "Lycos(c)", etc. like search syntax.  This means a search query can contain "+" and
           "-" as syntax parameter.

           Example:

               swish-e -w "+word1 +word2 -word3  word4 word5"
               "+"  = following word has to be in all found documents
               "-"  = following word may not be in any document found
               " "  = following word will be searched in documents

       SwishSearhOperators <and-word> <or-word> <not-word>
           NOTE: This following item is currently not available.

           Using this config directive you can change the boolean search operators of Swish-e,
           e.g. to adapt these to your language.  The default is:    AND  OR  NOT

           Example (german):

               SwishSearchOperators   UND  ODER  NICHT

       SwishSearchDefaultRule   [<AND-WORD>⎪<or-word>]
           NOTE: This following item is currently not available.

           "SwishSearchDefaultRule" defines the default Boolean operator to use if none is
           specified between words or phrases.  The default is "AND".

           The word you specify must match one of the available "SwishSearchOperators".

           Example:

               SwishSearchOperators   UND  ODER  NICHT
               # Make it act like a web search engine
               SwishSearchDefaultRule ODER

       ResultExtFormatName name -x format string
           NOTE: This following item is currently not available.

           The output of Swish-e can be defined by specifying a format string with the "-x"
           command line argument.  Using "ResultExtFormatName" you can assign a predefined format
           string to a name.

           Examples:

               ResultExtFormatName  moreinfo   "%c⎪%r⎪%t⎪%p⎪<author>⎪<publishyear>\n"

           Then when searching you can specify the format string's name

               swish-e   ...  -x moreinfo  ...

           See the "-x" switch in SWISH-RUN for more information about output formats.

       Administrative Headers Directives

       Swish-e stores configuration information in the header of the index file.  This
       information can be retrieved while searching or by functions in the Swish-e C library.
       There are a number of fields available for your own use.  None of these fields are
       required:

       IndexName *text*
       IndexDescription *text*
       IndexPointer *text*
       IndexAdmin *text*
           These variables specify information that goes into index files to help users and
           administrators.  IndexName should be the name of your index, like a book title.
           IndexDescription is a short description of the index or a URL pointing to a more full
           description.  IndexPointer should be a pointer to the original information, most
           likely a URL.  IndexAdmin should be the name of the index maintainer and can include
           name and email information.  These values should not be more than 70 or so characters
           and should be contained in quotes.  Note that the automatically generated date in
           index files is in D/M/Y and 24-hour format.

           Examples:

               IndexName "Linux Documentation"
               IndexDescription "This is an index of /usr/doc on our Linux machine."
               IndexPointer http://localhost/swish/linux/index.html
               IndexAdmin webmaster

       Document Source Directives

       These directives control what documents are indexed and how they are accessed.  See also
       Directives for the File Access method only and Directives for the HTTP Access Method Only
       for directives that are specific to those access methods.

       IndexDir [directories or files⎪URL⎪external program]
           IndexDir defines the source of the documents for Swish-e.  Swish-e currently supports
           three file access methods: File system, HTTP (also called spidering), and prog for
           reading files from an external program.

           The "-S" command line argument is used to select the file access method.

               swish-e -c swish.config -S fs    - file system
               swish-e -c swish.config -S http  - internal http spider
               swish-e -c swish.config -S prog  - external program of any type

           For the fs method of access IndexDir is a space-separated list of files and
           directories to index.  Use a forward slash as the path separator in MS Windows.

           For the http method the IndexDir setting is a list of space-separated URLs.

           For the prog method the IndexDir setting is a list of space-separated programs to run
           (which generate documents for swish to index).

           You may specify more than one IndexDir directive.

           Any sub-directories of any listed directory will also be indexed.

           Note: While processing directories, Swish-e will ignore any files or directories that
           begin with a dot (".").  You may index files or directories that begin with a dot by
           specifying their name with "IndexDir" or "-i".

           Examples:

               # Index this directory an any subdirectories
               IndexDir /usr/local/home/http

               # Index the docs directory in current directory
               IndexDir ./docs

               # Index these files in the current directory
               IndexDir ./index.html ./page1.html ./page2.html
               # and index this directory, too
               IndexDir ../public_html

           For the HTTP method of access specify the URL's from which you want the spidering to
           begin.

           Example:

               IndexDir http://www.my-site.com/index.html
               IndexDir http://localhost/index.html

           Obviously, using the HTTP method to index is much slower than indexing local files.
           Be well aware that some sites do not appreciate spidering and may block your IP
           address.  You may wish to contact the remote site before spidering their web site.
           More information about spidering can be found in Directives for the HTTP Access Method
           Only below.

           For the prog method of access IndexDir specifies the path to the program(s) to
           execute.  The external program must correctly format the documents being passed back
           to Swish-e.  Examples of external programs are provided in the prog-bin directory.

               IndexDir ./myprogram.pl

           See prog for details.

           Note: Not all directives work with all methods.

       NoContents *list of file suffixes*
           Files with these suffixes will not have their contents indexed, but will have their
           path name (file name) indexed instead.

           If the file's type is HTML or HTML2 (as set by "IndexContents" or "DefaultContents")
           then the file will be parsed for a HTML title and that title will be indexed.  Note
           that you must set the file's type with "IndexContents" or "DefaultContents": ".html"
           and ".htm" are NOT type HTML by default.  For example:

              IndexContents HTML* .htm .html

           If a title is found, it will still be checked for "FileRules title", and the file will
           be skipped if a match is found.  See "FileRules".

           If the file's type is not HTML, or it is HTML and no title is found, then the file's
           path will be indexed.

           For example, this will allow searching by image file name.

               NoContents .gif .xbm .au .mov .mpg .pdf .ps

           Note: Using this directive will not cause files with those suffixes to be indexed.
           That is, if you use "IndexOnly" to limit the types of files that are indexed, then you
           must specify in "IndexOnly" the same suffixes listed in "NoContents".

           This does not work:

               # Wrong!
               IndexOnly .htm .html
               NoContents .gif .xbm .au .mov .mpg .pdf .ps

           A "-S prog" program may set the "No-Contents:" header to enable this feature for a
           specific document (although it would be smarter for the "-S prog" program to simply
           only send the pathname or title to be indexed.

       ReplaceRules [replace⎪remove⎪prepend⎪append⎪regex]
           ReplaceRules allows you to make changes to file pathnames before they're indexed.
           These changed file names or URLs will be returned in search results.

           For example, you may index your files locally (with the File system indexing method),
           yet return a URL in search results.  This directive can be used to map the file names
           to their respective URLs on your web server.

           There are five operations you can specify: replace, append, remove, prepend, and regex
           They will parse the pathname in the order you've typed these commands.

           This directive uses C library regex.h regular expressions.

              replace "the string you want replaced" "what to change it to"
              remove "a string to remove"
              prepend "a string to add before the result"
              append "a string to add after the result"
              regex  "/search string/replace string/options"

           Remember, quotes are needed if an expression contains white space, and backslashes
           have special meaning.

           Regex is an Extended Regular Expression.  The first character found is the delimiter
           (but it's not smart enough to use matched chars such as [], (), and {}).

           The replace string may use substitution variables:

               $0      the entire matched (sub)string
               $1-$9   returns patterns captured in "(" ")" pairs
               $`      the string before the matched pattern
               $'      the string after the matched pattern

           The options change the behavior of expression:

               i       ignore the case when matching
               g       repeat the substitution for the entire pattern

           Examples:

               ReplaceRules replace testdir/ anotherdir/
               ReplaceRules replace [a-z_0-9]*_m.*\.html index.html

               ReplaceRules remove testdir/

               ReplaceRules prepend http://localhost/
               ReplaceRules append .html

               ReplaceRules regex  !^/web/(.+)/!http://$1.domain.com/!
               replaces a file path:
                   /web/search/foo/index.html
               with
                   http://search.domain.com/foo/index.html

               ReplaceRules regex  #^#http://localhost/www#
               ReplaceRules prepend http://localhost/www  (same thing)

               # Remove all extensions from C source files
               ReplaceRules remove .c     # ERROR! That "." is *any char*
               ReplaceRules remove \.c    # much better...

               ReplaceRules remove "\\.c" # if in quotes you need double-backslash!
               ReplaceRules remove "\.c"  # ERROR! "\." -> "." and is *any char*

       IndexContents [TXT⎪HTML⎪XML⎪TXT2⎪HTML2⎪XML2⎪TXT*⎪HTML*⎪XML*]  *file extensions*
           The "IndexContents" directive assigns one of Swish-e's document parsers to a document,
           based on the its extension.  Swish-e currently knows how to parse TXT, HTML, and XML
           documents.

           The XML2, HTML2, and TXT2 parsers are currently only available when Swish-e is
           configured to use libxml2.

           You may use XML*, HTML*, and TXT* to select the parser automatically.  If libxml2 is
           installed then it will be used to parse the content.  Otherwise, Swish-e's internal
           parsers will be used.

           Documents that are not assigned a parser with "IndexContents" will, by default, use
           the HTML2 parser if libxml2 is installed, otherwise will use Swish-e's internal HTML
           parser.  The "DefaultContents" directive may be used to assign a parser to documents
           that do not match a file extension defined with the "IndexContents" directive.

           Example:

               IndexContents HTML* .htm .html .shtml
               IndexContents TXT*  .txt .log .text
               IndexContents XML*  .xml

           HTML* is the default type for all files, unless otherwise specified (and this default
           can be changed by the DefaultContents directive.  Swish-e parses titles from HTML
           files, if available, and keeps track of the context of the text for context searching
           (see "-t" in SWISH-RUN).

           If using filters (with the "FileFilter" directive) to convert documents you should
           include those extensions, too.  For example, if using a filter to convert .pdf to
           .html, you need to tell Swish-e that .pdf should be indexed by the internal HTML
           parser:

               FileFilter  .pdf   pdf2html
               IndexContent  HTML  .pdf

           See also Document Filter Directives.

           Note: Some of this may be changed in the future to use content-types instead of file
           extensions.  See SWISH-3.0

       DefaultContents [TXT⎪HTML⎪XML⎪TXT2⎪HTML2⎪XML2⎪TXT*⎪HTML*⎪XML*]
           This sets the default parser for documents that are not specified in IndexContents. If
           not specified the default is HTML.

           The XML2, HTML2, and TXT2 parsers are currently only available when Swish-e is
           configured to use libxml2.

           You may use XML*, HTML*, and TXT* to select the parser automatically.  If libxml2 is
           installed then it will be used to parse the content.  Otherwise, Swish-e's internal
           parsers will be used.

           Example:

               DefaultContents HTML

           The "DefaultContents" directive should be used when spidering, as HTML files may be
           returned without a file extension (such as when requesting a directory and the default
           index.html is returned).

       FileInfoCompression [yes⎪NO]
           ** This directive is currently not supported **

           Setting FileInfoCompression to "yes" will compress the index file to save disk space.
           This may result in longer indexing times.  The default is "no".

           Also see the "-e" switch in SWISH-RUN for saving RAM during indexing.

       Document Contents Directives

       These directives control what information is extracted from your source documents, and how
       that information is made available during searching.

       ConvertHTMLEntities [YES⎪no]
           ASCII entities can be converted automatically while indexing documents of type HTML
           (not for HTML2).  For performance reasons you may wish to set this to "no" if your
           documents do not contain HTML entities.  The default is "yes".

           If "ConvertHTMLEntities" is set "no" the entities will be indexed without conversion.

           NOTE: Entities within XML files and files parsed with libxml2 (HTML2) are converted
           regardless of this setting.

       MetaNames *list of names*
           META names are a way to define "fields" in your XML and HTML documents.  You can use
           the META names in your queries to limit the search to just the words contained in that
           META name of your document.  For example, you might have a META tagged field in your
           documents called "subjects" and then you can search your documents for the word "foo"
           but only return documents where "foo" is within the "subjects" META tag.

               swish-e -w subjects=foo

           (See also the "-t" switch in SWISH-RUN for information about context searching in HTML
           documents.)

           The MetaNames directive is a space separated list.  For example:

               MetaNames meta1 meta2 keywords subjects

           You may also use "UndefinedMetaTags" to specify automatic extraction of meta names
           from your HTML and XML documents, and also to ignore indexing content of meta tags.

           META tags can have two formats in your HTML source documents:

               <META NAME="meta1" CONTENT="some content">

           and (if using the HTML2/libxml2 parser)

               <meta1>
                   some content
               </meta1>

           But this second version is invalid HTML, and will generate a warning if
           ParserWarningLevel is set (libxml2 only).

           And in XML documents, use the format:

               <meta1>
                   Some Content
               </meta1>

           Then you can limit your search to just META meta1 like this:

               swish-e -w 'meta1=(apples or oranges)'

           You may nest the XML and the start/end tag versions:

               <keywords>
                   <tag1>
                       some content
                   </tag1>
                   <tag2>
                       some other content
                   </tag2>
               <keywords>

           Then you can search in both tag2 and tag2 with:

               swish-e -w 'keywords=(query words)'

           Swish-e indexes all text as some metaname.  The default is "swishdefault", so these
           two queries are the same:

               swish-e -w foo
               swish-e -w swishdefault=foo

           When indexing HTML Swish-e indexes the HTML title as default text, so when searching
           Swish-e will find matches in both the HTML body and the HTML title.  Swish also, by
           default, indexes content of meta tags.  So:

               swish-e -w foo

           will find "foo" in the body, the title, or any meta tags.

           Currently, there's no way to prevent Swish-e from indexing the title contents along
           with the body contents, but see "UndefinedMetaTags" for how to control the indexing of
           meta tags.

           If you would like to search just the title text, you may use:

               MetaNames swishtitle

           This will index the title text separately under the built-in swish internal meta name
           "swishtitle".  You may then search like

               swish-e -w foo  -- search for "foo" in title, body (and undefined meta tags)
               swish-e -w swishtitle=foo -- search for "foo" in title only

           In addition to swishtitle, you can limit searches to documents' path with:

              MetaNames swishdocpath

           Then to search for "foo" but also limit searches to documents that include "manual" or
           "tutorial" in their path:

              swish-e -w foo swishdocpath=(manual or tutorial)

           See also "ExtractPath".

       MetaNameAlias *meta name* *list of aliases*
           MetaNameAlias assigns aliases for a meta name.  For example, if your documents contain
           meta tags "description", "summary", and "overview" that all give a summary of your
           documents you could do this:

               MetaNames summary
               MetaNameAlias summary description overview

           Then all three tags will get indexed as meta tag "summary".  You can then search all
           the fields as:

               -w summary=foo

           The Alias work at search time, too.  So these will also limit the search to the
           "summary" meta name.

               -w description=foo
               -w overview=foo

       MetaNamesRank integer *list of meta names*
           You can assign a bias to metanames that will affect how ranking is calculated.  The
           range of values is from -10 to +10, with zero being no bias.

               MetaNamesRank 4 subject
               MetaNamesRank 3 swishdefault
               MetaNamesRank 2 author publisher
               MetaNamesRank -5 wrongwords

           This feature is still considered experimental. If you use it, please send feedback to
           the discussion list.

       HTMLLinksMetaName *metaname*
           Allows indexing of HTML links.  Normally, HTML links (href tags) are not indexed by
           Swish-e.  This directive defines a metaname, and links will be indexed under this meta
           name.

           Example:

               HTMLLinksMetaName links

           Now, to limit searches to files with a link to "home.html" do this:

               -w links='"home.html"'

           The double quotes force a phrase search.

           To make Swish-e index links as normal text, you may use:

               HTMLLinksMetaName swishdefault

           This feature is only available with the libxml2 HTML parser.

       ImageLinksMetaName *metaname*
           Allows indexing of image links under a metaname.  Normally, image URLs are not
           indexed.

           Example:

               ImagesLinksMetaName images

           Now, if you would like to find pages that include a nice image of a beach:

               -w images='beach'

           To make Swish-e index links as normal text, you may use:

               ImageLinksMetaName swishdefault

           This feature is only available with the libxml2 HTML parser.

       IndexAltTagMetaName *tagname*⎪as-text
           Allows indexing of images <IMG> ALT tag text.  Specify either a tag name which will be
           used as a metaname, or the special text "as-text" which says to index the ALT text as
           if it were plain text at the current location.

           For example, by specifying a tag name:

              IndexAltTagMetaName bar

           would make this markup:

               <foo>
                   <img src="/someimage.png" alt="Alt text here">
               </foo>

           appear like

               <foo>
                   <bar>Alt text here</bar>
               </foo>

           Then the normal rules ("MetaNames" and "PropertyNames") apply to how that text is
           indexed.

           If you use the special tag "as-text" then

               <foo>
                   <img src="/someimage.png" alt="Alt text here">
               </foo>

           simply becomes

               <foo>
                   Alt text here
               </foo>

           This feature is only available when using the libxml2 parser (HTML2 and XML2).

       AbsoluteLinks [yes⎪NO]
           If this is set true then Swish-e will attempt to convert relative URIs extracted from
           HTML documents for use with "HTMLLinksMetaName" and "ImageLinksMetaName" into absolute
           URIs.  Swish-e will use any <BASE> tag found in the document, otherwise it will use
           the file's pathname.  The pathname used will be the pathname *after* "ReplaceRules"
           has been applied to the document's pathname.

           For example, say you wish to index image links under the metaname "images".

               ImageLinksMetaName images

           If an image is located in http://localhost/vacations/france/index.html and
           "AbsoluteLinks" is set to no, then a image within that document:

                <img src="beach.jpeg">

           will only index "beach.jpeg".

           But, if you want more detail when searching, you can enable "AbsoluteLinks" and Swish-
           e will index "http://localhost/vacations/france/beach.jpeg".  You can then look for
           images of beaches, but only in France:

               -w images=(beach and france)

           This also means you can search for any images within France:

               -w images=(france)

           This feature is only available with the libxml2 HTML parser.

       UndefinedMetaTags [error⎪ignore⎪INDEX⎪auto]
           This directive defines the behavior of Swish-e during indexing when a meta name is
           found but is not listed in MetaNames.  There are four choices:

           error
             If a meta name is found that is not listed in MetaNames then indexing will be halted
             and an error reported.

           ignore
             The contents of the meta tag are ignored and not indexed unless a metaname has been
             defined with the "MetaNames" directive.

           index
             The contents of the meta tag are indexed, but placed in the main index unless
             there's an enclosing metatag already in force. This is the default.

           auto
             This method create meta tags automatically for HTML meta names and XML elements.
             Using this is the same as specifying all the meta names explicitly in a MetaNames
             directive.

       UndefinedXMLAttributes [DISABLE⎪error⎪ignore⎪index⎪auto]
           This is similar to "UndefinedMetaTags", but only applies to XML documents (parsed with
           libxml2).  This allows indexing of attribute content, and provides a way to index the
           content under a metaname.  For example, "UndefinedXMLAttributes" can make

               <person age="23">
                     John Doe
               </person>

           look like the following to swish:

               <person>
                   <person.age>
                       23
                   </person.age>
                   John Doe
               </person>

           What happens to the text "23" will depend on the setting of "UndefinedXMLAttributes":

           disable
             XML attributes are not parsed and not indexed.  This is the default.

           error
             If the concatenated meta name (e.g. person.age) is not listed in MetaNames then
             indexing will be halted and an error reported.

           ignore
             The contents of the meta tag are ignored and not indexed unless a metaname has been
             defined with the "MetaNames" directive.

           index
             The contents of the meta tag are indexed, but placed in the main index unless
             there's an enclosing metatag already in force.

           auto
             This method will create meta tags from the combined element and attributes (and XML
             Class name) This options should be used with caution as it can generate a lot of
             metaname entries.

             See also the example below "XMLClassAttribues".

       XMLClassAttributes *list of XML attribute names*
           Combines an XML class name with the element name to make up a metaname.  For example:

               XMLClassAttributes class

               <person class="first">
                   John
               </person>
               <person class="last">
                   Doe
               </person>

           Will appear to Swish-e as:

               <person>
                   <person.first>
                   John
                   </person.first>
               </person>
               <person>
                   <person.last>
                   Doe
                   </person.last>
               </person>

           How the data is indexed depends on "MetaNames" and "UndefinedMetaTags".

           Here's an example using the following configuration which combines the two directives
           "XMLClassAttributes" and "UndefinedXMLAttributes".

               XMLClassAttributes class
               UndefinedMetaTags auto
               UndefinedXMLAttributes auto
               IndexContents XML2 .xml

           The source XML file looks like:

               <xml> <person class="student" phone="555-1212" age="102"> John </person>
               <person greeting="howdy">Bill</person> </xml>

           Swish-e parses as:

               ./swish-e -c 2 -i 1.xml -T parsed_tags  parsed_text  -v 0
               Indexing Data Source: "File-System"

               <xml> (MetaName)

                   <person> (MetaName)
                       <person.student> (MetaName)
                           <person.student.phone> (MetaName)
                               555-1212
                           </person.student.phone>
                           <person.student.age> (MetaName)
                               102
                           </person.student.age>
                           John
                   </person>

                   <person> (MetaName)
                       <person.greeting> (MetaName)
                           howdy
                       </person.greeting>
                       Bill
                   </person>

               </xml>
               Indexing done!

           One thing to note is that the first <person> block finds a class name "student" so all
           metanames that are created from attributes use the combined name "person.student".
           The second <person> block doesn't contain a "class" so, the attribute name is combined
           directly with the element name (e.g. "person.greeting").

       ExtractPath *metaname* [replace⎪remove⎪prepend⎪append⎪regex]
           This directive can be used to index extracted parts of a document's path.  A common
           use would be to limit searches to specific areas of your file tree.

           The extracted string will be indexed under the specified meta name.

           See "ReplaceRules" for a description of the various pattern replacement methods, but
           you will use the regex method.

           For example, say your file system (or web tree) was organized into departments:

               /web/sales/foo...
               /web/parts/foo...
               /web/accounting/foo...

           And you wanted a way to limit searches to just documents under "sales".

               ExtractPath department regex !^/web/([^/]+)/.*$!$1!

           Which says, extract out the department name (as substring $1) and index it as meta
           name "department".  Then to limit a search to the sales department:

               swish-e -w foo AND department=sales

           Note that the "regex" method uses a substitution pattern, so to index only a sub-
           string match the entire document path in the regular expression, as shown above.
           Otherwise any part that is not matched will end up in the substitution pattern.

           See the "ExtractPathDefault" option for a way to set a value if not patterns match.

           Although unlikely, you may use more than one "ExtractPath" directive.  More than one
           directive of the same meta name will operate successively (in order listed in the
           configuration file) on the path.  This allows you to use regular expressions on the
           results of the previous pattern substitution (as if piping the output from one
           expression to the patter of the next).

               ExtractPath foo regex !^(...).+$!$1!
               ExtractPath foo regex !^.+(.)$!$1!

           So, the third letter is indexed as meta name "foo" if both patterns match.

               ExtractPath foo regex !^X(...).+$!$1!
               ExtractPath foo regex !^.+(.)$!$1!

           Now (not the "X"), if the first pattern doesn't match, the last character of the path
           name is indexed.  You must be clear on this behavior if you are using more than one
           "ExtractPath" directive with the same metaname.

           The document path operated on is the real path swish used to access the document.
           That is, the "ReplaceRules" directive has no effect on the path used with
           "ExtractPath".

           The full path is used for each meta name if more than one "ExtractPath" directive is
           used.  That is, changes to the path used in "ExtractPath foo" do not affect the path
           used by "ExtractPath bar".

       ExtractPathDefault *metaname* default_value
           This can be used with "ExtractPath" to set a default string to index under the given
           metaname if none of the "ExtractPath" patterns match.

           For example, say your want to index each document with a metaname "department" based
           on the following path examples:

               /web/sales/foo...
               /web/parts/foo...
               /web/accounting/foo...

           But you are also indexing documents that do not follow that pattern and you want to
           search those separately, too.

               ExtractPath department regex !^/web/([^/]+)/.*$!$1!
               ExtractPathDefault department other

           Now, you may search like this:

               -w foo department=(sales)      - limit searches to the sales documents
               -w foo department=(parts)      - limit searches to the parts documents
               -w foo department=(accounting) - limit searches to the accounting documents
               -w foo department=(other)      - everything but sales, parts, and accounting.

           This basically is a shortcut for:

               -w foo not department=(sales or parts or accounting)

           but you don't need to keep track of what was extracted.

       PropertyNames *list of meta names*
       PropertyNamesCompareCase *list of meta names*
       PropertyNamesIgnoreCase *list of meta names*
           Swish-e allows you to specify certain META tags that can be used as document
           properties.  The contents of any META tag that has been identified as a document
           property can be returned as part of the search results along with the rank, file name,
           title, and document size (see the "-p" and "-x" switches in SWISH-RUN).

           Properties are useful for returning additional data from documents in search results
           -- this saves the effort of reading and parsing the source files while reading Swish-e
           search results, and is especially useful when the source documents are no longer
           available or slow to access (e.g. over http).

           Another feature of properties is that Swish-e can use the PropertyNames for sorting
           the search results (see the "-s" switch).

               PropertyNames author subjects

           Two variations are available.  "PropertyNamesCompareCase" and
           "PropertyNamesIgnoreCase".  These tell Swish-e to either ignore or compare case when
           sorting results.  The default for "PropertyNames" is to ignore the case.

               PropertyNamesIgnoreCase subject
               PropertyNamesCompareCase keyword

           The defaults for "internal" properties are:

               swishtitle          --  ignore the case
               swishdocpath        --  compare case
               swishdescription    --  compare case

           These can be overridden with "PropertyNamesCompareCase" and "PropertyNamesIgnoreCase".

               PropertyNamesCompareCase swishtitle

           Use of PropertyNames will increase the size of your index files, sometimes
           significantly.  Properties will be compressed if Swish-e is compiled with zlib as
           described in the INSTALL manual page.

           If Swish-e finds more than one property of the same name in a document the property's
           contents will be concatinated for strings, and a warning issues for numeric (or date)
           properties.

       PropertyNamesNoStripChars
           PropertyNamesNoStripChars specifies that the listed properties should not have strings
           of low ASCII characters replaced with a space character.  Properties will be stored as
           found in the document.

           When printing properties with the swish-e binary newlines are replaced with a space
           character.  Use the swish-e library (or SWISH::API perl module) to fetch properties
           without newlines replaced.

       PropertyNamesNumeric
           This directive is similar to "PropertyNames", but it flags the property as being a
           string of digits (integer value) that will be stored as binary data instead of a
           string.  This allows sorting with "-s" and limiting with "-L" to sort and limit the
           property correctly.

           Swish-e uses strtoul(3) to convert the string into an unsigned long integer.
           Therefore, only positive integers can be stored.

           Future versions of Swish-e may be able to store different property types (such as
           negative integers and real numbers).  This directive may change in future releases of
           Swish.

       PropertyNamesDate
           This directive is exactly like "PropertyNamesNumeric", but it also flags the number as
           a machine timestamp (seconds since Epoch), and will print a formatted date when
           returning this property.  See "-x" in SWISH-RUN.

           Swish-e will not parse dates when indexing; you must use a timestamp.

       PropertyNameAlias  *property name* *list of aliases*
           This allows aliases for a property name.  For example, if you are indexing HTML files,
           plus XML files that are written in English, German, and Spanish and thus use the tags
           "title", "titel", and "título" you can use:

               PropertyNameAlias swishtitle title titel título titulo

           Note that "swishtitle" is the built-in property used to store the title of a document,
           and therefore you do not need to specify it as a PropertyName before use.

       PropertyNamesMaxLength  integer *list of meta names*
           This option will set the max length of the text stored in a property.  You must
           specify a number between 0 and the max integer size on your platform, and a list of
           properties.  The properties specified must not be aliases.

           If any of the property names do not exist they will be created (e.g. you do not need
           to define the property with PropertyNames first).

           In general, this feature will only be useful when parsing HTML or XML with the libxml2
           parser.

           For example:

               PropertyNamesMaxLength 1000 swishdescription
               PropertyNameAlias swishdescription body

           Is somewhat like

               StoreDescription HTML <body> 1000
               StoreDescription XML <body> 1000
               StoreDescription HTML2 <body> 1000
               StoreDescription XML2 <body> 1000

           but StoreDescription allows setting the tag for each parser type.

               PropertyNamesMaxLength 1000 headings
               PropertyNameAlias headings h1 h2 h3 h4

           collects all the heading text into a single property called "headings", not to exceed
           1000 characters.

       PropertyNamesSortKeyLength  integer *list of meta names*
           Sets the length of the string used when sorting.  The default is 100 characters.  The
           -T metanames debugging option will list the current values for an index.

           This setting is used when sorting during indexing, and perhaps when sorting while
           searching.  It also effects the order when limiting to a range of values with the -L
           option.

       PreSortedIndex *list of property names*
           By default Swish-e generates presorted tables while indexing for each property name.
           This allows faster sorting when generating results.  On large document collections
           this presorting may add to the indexing time, and also adds to the total size of the
           index.  This directive can be used to customize exactly which properties will be
           presorted.

           If "PreSortedIndex" it is not present in the config file (default action), all the
           properties will be presorted at indexing time.  If it is present without any
           parameter, no properties will be presorted.  Otherwise, only the property names
           specified will be presorted.

           For example, if you only wish to sort results by a property called "title":

               PropertyNames title age time
               PreSortedIndex  title

       StoreDescription [XML <tag> size⎪HTML <meta> size⎪TXT size]
           StoreDescription allows you to store a document description in the index file.  This
           description can be returned in your search results when the "-x" switch is used to
           include the swishdescription for extended results, or by using "-p swishdescription".

           The document type (XML, HTML and TXT) must match the document type currently being
           indexed as set by "IndexContents" or "DefaultContents".  See those directives for
           possible values.  A common problem is using "StoreDescription" yet not setting the
           document's type with "IndexContents" or "DefaultContents".  Another problem is
           different types:

               IndexContents HTML2 .html
               StoreDescription HTML <body>

           Then .html documents are assigned a type of HTML2 (and parsed by the libxml2 parser),
           but the description will not be stored since it is type HTML instead of HTML2.

           For text documents you specify the type TXT (or TXT2 or TXT*) and the number of
           characters to capture.

               StoreDescription TXT 20

           The above stores only the first twenty characters from the text file in the Swish-e
           index file.

           For HTML, and XML file types, specify the tag to use for the description, and
           optionally the number of characters to capture.  If not specified will capture the
           entire contents of the tag.

               StoreDescription HTML <body> 20000
               StoreDescription XML  <desc> 40

           Again, note that documents must be assigned a document type with "IndexContents" or
           "DefaultContents" to use this feature.

           Swish-e will compress the descriptions (or any other large property) if compiled to
           use zlib (see INSTALL).  This is recommended when using StoreDescription and a large
           number of documents.  Compression of 30% to 50% is not uncommon with HTML files.

       PropCompressionLevel [0-9]
           This directive sets the compression level used when storing properties to disk.  A
           setting of zero is no compression, and a setting of nine is the most compression.

           The default depends on the default setting compiled with zlib, but is typically six.

           This option is useful when using "StoreDescription" to store a large amount text in
           properties (or if using "PropertyNames" with large property sizes).

           Properties must be over a value defined in config.h (100 is the default) before
           compression will be attempted.  Swish-e will never store the results of the
           compression if the compressed data is larger than the original data.

           This option is only available when Swish-e is compiled with zlib support.

       TruncateDocSize *number of characters*
           TruncateDocSize limits the size of a document while indexing documents and/or using
           filters.  This config directive truncates the numbers of read bytes of a document to
           the specified size.  This means: if a document is larger, read only the specified
           numbers of bytes of the document.

           Example:

               TruncateDocSize    10000000

           The default is zero, which means read all data.

           Warning: If you use TruncateDocSize, use it with care!  TruncateDocSize is a safety
           belt only, to limit e.g.  filteroutput, when accessing databases, or to limit
           "runnaway" filters.  Truncating doc input may destroy document structures for Swish-e
           (e.g.  swish may miss closing tags for XML or HTML documents).

           TruncateDocSize does not currently work with the "prog" input source method.

       FuzzyIndexingMode NONE⎪Stemming⎪Soundex⎪Metaphone⎪DoubleMetaphone
           Selects the type of index to create.  Only one type of index may be created.

           It's a good idea to create both a normal index and a fuzzy index and allow your search
           interface select which index to use.  Many people find the fuzzy searches to be too
           fuzzy.

           The available fuzzy indexing options can be displayed by running

              swish-e -T LIST_FUZZY_MODES

           Available options include:

           None
               Words are stored in the index without any conversion.  This is the default.

           Stemming_*
               This options uses one of the installed Snowball stemmers
               (http://snowball.tartarus.org/).

               The installed stemmers can be viewed by running

                  swish-e -T LIST_FUZZY_MODES

               For example, to use the Spanish stemming module:

                  FuzzyIndexingMode Stemming_es

           Stem or Stemming_en
               **This option is no longer supported.**

               Selects the legacy Swish-e English stemmer.

               This is deprecated in favor of the Snowball English stemmer Stemming_en1.

               Words are converted using the Porter stemming algorithm.

               From: http://www.tartarus.org/~martin/PorterStemmer/

                   The Porter stemming algorithm (or Porter stemmer) is a
                   process for removing the commoner morphological and inflexional
                   endings from words in English. Its main use is as part of a
                   term normalisation process that is usually done when setting up
                   Information Retrieval systems.

               This will help a search for "running" to also find "run" and "runs", for example.

               The stemming function does not convert words to their root, rather
               programmatically removes endings on words in an attempt to make similar words with
               different endings stem to the same string of characters.  It's not a perfect
               system, and searches on stemmed indexes often return curious results.  For
               example, two entirely different words may stem to the same word.

               Stemming also can be confusing when used with a wildcard (truncation).  For
               example, you might expect to find the word "running" by searching for "runn*".
               But this fails when using a stemmed index, as "running" stems to "run", yet
               searching for "runn*" looks for words that start with "runn".

           Soundex
               Soundex was developed in the 1880s so records for people with similar sounding
               names could be found more readily.  Soundex is a coded surname based on the way a
               surname sounds rather than spelling.  Surnames that sound similar, like Smith and
               Smyth, are filed together under the same Soundex code.  This is mostly useful for
               US English.

               Soundex should not be used to search for sound-alike words.  Metaphone would be
               more appropriate for generic sound matching of words.  Soundex should only be used
               where you need to search multiple documents for proper names which sound similar.
               This is primarily used for indexing genealogical records.  This may be useful for
               indexing other collections of data consisting mostly of names.  Many common name
               variations are matched by Soundex.  The only notable exception is the first letter
               of the name.  The first letter is not matched for sound.

           Metaphone and DoubleMetaphone
               Words are transformed into a short series of letters representing the sound of the
               word (in English).  Metaphone algorithms are often used for looking up mis-spelled
               words in dictionary programs.

               From: http://aspell.sourceforge.net/metaphone/

                   Lawrence Philips' Metaphone Algorithm is an algorithm which returns
                   the rough approximation of how an English word sounds.

               The "DoubleMetaphone" mode will sometimes generate two different metaphones for
               the same word.  This is supposed to be useful when a word may be pronounced more
               than one way.

               A metaphone index should give results somewhere in between Soundex and Stemming.

       UseStemming [yes⎪NO]
           Put yes to apply word stemming algorithm during indexing, else no.

               UseStemming no
               UseStemming yes

           When UseStemming is set to "yes" every word is stemmed before placing it in to the
           index.

           This option is deprecated.  It has been superceded by "FuzzyIndexingMode".

       UseSoundex [yes⎪NO]
           When UseSoundex is set to "yes" every word is converted to a Soundex code before
           placing it in to the index.

           This option is deprecated.  It has been superceded by "FuzzyIndexingMode".

       IgnoreTotalWordCountWhenRanking [YES⎪no]
           Put yes to ignore the total number of words in the file when calculating ranking.
           Often better with merges and small files. Default is yes.

               IgnoreTotalWordCountWhenRanking no

           The default was changed from no to yes in version 2.2.

           NOTE: must be set to no if you intend to use the -R 1 option when searching.

       MinWordLimit *integer*
           Set the minimum length of an word. Shorter words will not be indexed.  The default is
           1 (as defined in src/config.h).

               MinWordLimit 5

       MaxWordLimit *integer*
           Set the maximum length of an indexable word. Every longer word will not be indexed.
           The Default is 40 (as defined in src/config.h).

       WordCharacters *string of characters*
       IgnoreFirstChar *string of characters*
       IgnoreLastChar *string of characters*
       BeginCharacters *string of characters*
       EndCharacters *string of characters*
           These settings define what a word consists of to the Swish-e indexing engine.
           Compiled in defaults are in src/config.h.

           When indexing Swish-e uses WordCharacters to split up the document into words.  Words
           are defined by any string of non-blank characters that contain only the characters
           listed in WordCharacters.  If a string of characters includes a character that is not
           in WordCharacters then the word will be spit into two or more separate words.

           For example:

               WordCharacters abde

           Would turn "abcde" into two words "ab" and "de".

           Next, of these words, any characters defined in IgnoreFirstChar are stripped off the
           start of the word, and IgnoreLastChar characters are stripped off the end of the word.
           This allows, for example, periods within a word (www.slashdot.com), but not at the end
           of a word.  Characters in IgnoreFirstChar and IgnoreLastChar must be in
           WordCharacters.

           Finally, the resulting words MUST begin with one of the characters listed in
           BeginCharacters and end with one of the characters listed in EndCharacters.
           BeginCharacters and EndCharacters must be a subset of the characters in
           WordCharacters.  Often, WordCharacters, BeginCharacters and EndCharacters will all be
           the same.

           Note that the same process applies to the query while searching.

           Getting these settings correct will take careful consideration and practice.  It's
           helpful to create an index of a single test file, and then look at the words that are
           placed in the index (see the "-v 4", "-D" and "-k" searching switches).

           Currently there is only support for eight-bit characters.

           Example:

               WordCharacters  .abcdefghijklmnopqrstuvwxyz
               BeginCharacters abcdefghijklmnopqrstuvwxyz
               EndCharacters   abcdefghijklmnopqrstuvwxyz
               IgnoreFirstChar .
               IgnoreLastChar  .

           So the string

               Please visit http://www.example.com/path/to/file.html.

           will be indexed as the following words:

               please
               visit
               http
               www.example.com
               path
               to
               file.html

           Which means that you can search for "www.example.com" as a single word, but searching
           for just "example" will not find the document.

           Note: when indexing HTML documents HTML entities are converted to their character
           equivalents before being processed with these directives.  This is a change from
           previous versions of Swish-e where you were required to include the characters
           "0123456789&#;" to index entities.  See also "ConvertHTMLEntities"

       Buzzwords [*list of buzzwords*⎪File: path]
           The Buzzwords option allows you to specify words that will be indexed regardless of
           WordCharacters, BeginCharacters, EndCharacters, stemming, soundex and many of the
           other checks done on words while indexing.

           Buzzwords are case insensitive.

           Buzzwords should be separated by spaces and may span multiple directives.  If the
           special format "File:filename" is used then the Buzzwords will be read from an
           external file during indexing.

           Examples:

               Buzzwords C++ TCP/IP

               Buzzwords File: ./buzzwords.lst

           If a Buzzword contains search operator characters they must be backslashed when
           searching.  For example:

               Buzzwords C++ TCP/IP web=http

               ./swish-e -w 'web\=http'

           Buzzwords are found by splitting the text on whitespace, removing "IgnoreFirstChar"
           and "IgnoreLastChar" characters from the word, and then comparing with the list of
           "Buzzwords".  Therefore, if adding "Buzzwords" to an index you will probably want to
           define "IgnoreFirstChar" and "IgnoreLastChar" settings.

           Note: Buzzwords specific settings for "IgnoreFirstChar" and "IgnoreLastChar" may be
           used in the future.

       CompressPositions  [yes⎪NO]
           This option enables zlib compression for individual word data in the index file.  The
           default is NO, that is the index word data is not compressed by default.

           Enabling this option can reduced the size of the index file, but at the expense of
           slower wildcard search times.

           The default changed from YES to NO starting with version 2.4.3.

       IgnoreWords [*list of stop words*⎪File: path]
           The IgnoreWords option allows you to specify words to ignore, called stopwords.  The
           default is to not use any stopwords.

           Words should be separated by spaces and may span multiple directives.  If the special
           format "File:filename" is used then the stop words will be read from an external file
           during indexing.

           In previous versions of Swish-e you could use the directive

               IgnoreWords swishdefault - obsolete!

           to include a default list of compiled in stopwords.  This keyword is no longer
           supported.

           Examples:

               IgnoreWords www http a an the of and or

               IgnoreWords File: ./stopwords.de

       UseWords [*list of words*⎪File: path]
           UseWords defines the words that Swish-e will index.  Only the words listed will be
           indexed.

           You can specify a list of words following the directive (you may specify more than one
           "UseWords" directive in a config file), and/or use the "File:" form to specify a path
           to a file containing the words:

               UseWords perl python pascal fortran basic cobal php
               UseWords File: /path/to/my/wordlist

           Please drop the Swish-e list a note if you actually use this feature.  It may be
           removed from future versions.

       IgnoreLimit *integer integer*
           This automatically omits words that appear too often in the files (these words are
           called stopwords). Specify a whole percentage and a number, such as "80 256". This
           omits words that occur in over 80% of the files and appear in over 256 files. Comment
           out to turn off auto-stopwording.

               IgnoreLimit 50 1000

           Swish-e must do extra processing to adjust the entire index when this feature is used.
           It is recommended that instead of using this feature that you decided what words are
           stopwords and add them to IngoreWords in your configuration file.  To do this, use
           IgnoreLimit one time and note the stop words that are found while indexing.  Add this
           list to IgnoreWords, and then remove IgnoreLimit from the configuration file.

       IgnoreMetaTags *list of names*
           "IgnoreMetaTags" defines a list of metatags to ignore while indexing XML files (and
           HTML files if using libxml2 for parsing HTML).  All text within the tags will be
           ignored -- both for indexing ("MetaNames") and properties ("PropertyNames").  To still
           parse properties, yet do not index the text, see "UndefinedMetaTags".

           This option is useful to avoid indexing specific data from a file.  For example:

               <person>
                   <first_name>
                       William
                   </first_name> <last_name>
                       Shakespeare
                   </last_name> <updated_date>
                       April 25, 1999
                   </updated_date>
               </person>

           In the above example you might not want to index the updated date, and therefore
           prevent finding this record by searching

               -w 'person=(April)'

           This is solved by:

               IgnoreMetaTags updated_date

           See also "UndefinedMetaTags".

       IgnoreNumberChars *list of characters*
           Experimental Feature

           This experimental feature can be used to define a set of characters that describe a
           number.  If a word is found to contain only those characters it will not be indexed.
           The characters listed must be part of "WordCharacters" settings.  In other words, the
           "word" checked is a word that Swish-e would otherwise index.

           For example,

               IgnoreNumberChars 0123456789$.,

           Then Swish-e would not index the following:

               123
               123,456.78
               $123.45

           You might be tempted to avoid indexing hex numbers with:

               IgnoreNumberChars 0123456789abcdef

           which will not index 0D31, but will also not index the word "bad".

           This is an experimental feature that may change in future versions.  One possible
           change is to use regular expressions instead.

       IndexComments [NO⎪yes]
           This option allows the user decide if to index the contents of HTML comments.  Default
           is no. Set to yes if comment indexing is required.

               IndexComments yes

           Note: This is a change in the default behavior prior to version 2.2.

       TranslateCharacters [*string1 string2*⎪:ascii7:]
           The TranslateCharacters directive maps the characters in string1 to the characters
           listed in string2.

           For example:

               # This will index a_b as a-b and ámo as amo
               TranslateCharacters _á -a

           "TranslateCharacters :ascii7:" is a predefined set of characters that will translate
           eight bit characters to ascii7 characters.  Using the :ascii7: rule will translate
           "Ääç" to "aac". This means: searching "Çelik", "çelik" or "celik" will all match the
           same word.

           TranslateCharacters is done early in the indexing process, after converting HTML
           entities but before splitting the input text into words based on WordCharacters.  So
           characters you are translating from do not need to be listed in word characters.

           The same character translations take place when searching.

       BumpPositionCounterCharacters *string*
           When indexing Swish-e assigns a word position to each word.  This enables phrase
           searching.  There may be cases where you would like to prevent phrase matching.  The
           BumpPositionCounterCharacters directive allows you to specify a set of characters that
           when found in the text will increment the word position -- effectively preventing
           phrase matches across that character.

           For example, if you have a tag:

               <subjects>
                   computer programming ⎪ apple computers
               </subjects>

           You might want to prevent matching "programming apple" in that meta name.

               BumpPositionCounterCharacters ⎪

           There is no default, and you may list a string of characters.

       DontBumpPositionOnEndTags *list of names*
       DontBumpPositionOnStartTags *list of names*
           Since metatags are typically separate data fields, the word position counter is
           automatically bumped between metatags (actually, bumped when a start tag is found and
           when an end tag is found).  This prevents matching a phrase that spans more than one
           metaname.  "DontBumpPositionOnEndTags" and "DontBumpPositionOnStartTags" disables this
           feature for the listed metanames.

           For example,

               <person>
                   <first_name>
                       William
                   </first_name>
                   <last_name>
                       Shakespeare
                   </last_name>
                   <updated_date>
                       April 25, 1999
                   </updated_date>
               </person>

           In the configuration file:

               DontBumpPositionOnEndTags first_name
               DontBumpPositionOnStartTags last_name

           This configuration allows this phrase search

               -w 'person=("william shakespeare")'

           but this phrase search will fail

               -w 'person=("shakespeare april")'

       Directives for the File Access method only

       Some directives have different uses depending on the source of the documents.  These
       directives are only valid when using the File system method of indexing.

       IndexOnly *list of file suffixes*
           This directive specifies the allowable file suffixes (extensions) while indexing.  The
           default is to index all files specified in IndexDir.

               # Only index .html .htm and .q files
               IndexOnly .html .htm .q

           "IndexOnly" checks that the file end in the characters listed.  It does not check
           "extensions".  "IndexOnly" is tested right before "FileRules" is processed.

       FollowSymLinks [yes⎪NO]
           Put "yes" to follow symbolic links in indexing, else "no".  Default is no.

               FollowSymLinks no
               FollowSymLinks yes

           Note that when set to "no" extra stat(2) system calls must be made for each file.  For
           large number of files you may see a small reduction in indexing time by setting this
           to "yes".

           See also the "-l" switch in SWISH-RUN.

       FileRules [type] [contains⎪is⎪regex] *regular expression*
       FileMatch [type] [contains⎪is⎪regex] *regular expression*
           FileRules and FileMatch are used to, respectively, exclude and include files and
           directories to index.  Since, by default, Swish-e indexes all files and recurses all
           directories (but see also "FollowSymLinks") you will typically only use "FileRules" to
           exclude files or directories.  "FileMatch" is useful in a few cases, for example, to
           override the behavior of "IndexOnly".  Some examples are included below.

           Except for "FileRules title ...", this feature is only available for file access
           method (-S fs), which is the default indexing mode.  Also, any pathname modification
           with "ReplaceRules" happens after the check for "FileRules".  (It's unlikely that you
           would exclude files with "FileRules" based on text you added with "ReplaceRules"!)

           The regular expression is a C regex.h extended regular expression.  You may supply
           more than one regular expression per line, or use separate directives.  Preceding the
           regular expression with the word "not" negates the match.

           The regular expression is compared against [type] as described below.

           For historical reasons, you can specify "contains" or "is".  "is" simply forces the
           regular expression to match at the start and end of the string (by internally
           prepending "^" and appending "$" to the regular expression).

           The "regex" option requires delimiter characters:

               FileRules title regex /^private/i

           The only advantage of "regex" is if you want to do case insensitive matches, or simply
           like your regular expressions to look like perl regular expressions.  You must use
           matching delimiters; (), {}, and [], are not currently supported for no good reason
           other than laziness.

           Use quotes (" or ') around a pattern if it contains any white space.  Note that the
           backslash character becomes the escape character within quotes.

           For example, these sets generate the same regular expressions.

               FileRules title is hello
               FileRules title contains ^hello$
               FileRules title regex /^hello$/

           These all need quotes due to the included space character

               FileRules title is "hello there"
               FileRules title contains "^hello there$"
               FileRules title regex "!^hello there$!"

           These show how the backslash must be doubled inside of quotes.  Swish-e converts a
           double-backslash into a single backslash, and then passes that single onto the regular
           expression compiler.

               FileRules filename regex /\.pdf/
               FileRules filename regex "/\\.pdf/"

               FileRules filename regex !hello\\there!     # need double for real backslash
               FileRules filename regex "!hello\\\\there!" # need double-double inside of quotes

           Matching Types

           The following types of match strings my be supplied:

               FileRules pathname
               FileRules dirname
               FileRules filename
               FileRules directory
               FileRules title

               FileMatch pathname
               FileMatch filename
               FileMatch dirname
               FileMatch directory

           pathname matches the regular expression against the current pathname.  The pathname
           may or may not be absolute depending on what you supplied to "IndexDir".

           Example:

               # Don't index paths that contain private or hidden
               FileRules pathname contains (private⎪hidden)

               # Same thing
               FileRules pathname regex /(private⎪hidden)/

               # Don't index exe files
               FileRules pathname contains \.exe$

           dirname and filename split the path name by the last delimiter character into a
           directory name, and a file name.  Then these are compared against the patterns
           supplied.  Directory names do not have a trailing slash.  All path names use the
           forward slash as a delimiter within Swish-e.

           Example:

               # Same as last example - don't index *.exe files.
               FileRules filename contains \.exe$

               # Don't index any file called test.html files
               FileRules filename contains ^test\.html$

               # Same thing
               FileRules filename is test\.html

               # Don't index any directories that contain "old"  (/usr/local/myold/docs)
               FileRules dirname contains old

               # Don't index any directories that contain the path segment "old" (/usr/local/old/foo)
               FileRules dirname contains /old/

               # Index only .htm, .html, plus any all-digit file names
               IndexOnly .htm .html
               FileMatch filename contains ^\d+$

               # Same as previous, but maybe a little slower
               FileRules filename regex not !\.(htm⎪html)$!
               FileMatch filename contains ^\d+$

           Swish-e checks these settings in the order of "pathname", "dirname", and "filename",
           and "FileMatch" patterns are checked before "FileRules", in general.  This allows you
           to exclude most files with "FileRules", yet allow in a few special cases with
           "FileMatch". For example:

               # Exclude all files of .exe, .bin, and .bat
               FileRules filename contains \.(exe⎪bin⎪bat)$
               # But, let these two in
               FileMatch filename is baseball\.bat incoming_mail\.bin

               # Same, but as a single pattern
               FileMatch filename is (baseball\.bat⎪incoming_mail\.bin)

           The "directory" type is somewhat unique. When Swish-e recurses into a directory it
           will compare all the files in the directory with the pattern and then decide if that
           entire directory should or should not be indexed (or recursed).  Note that you are
           matching against file names in a directory -- and some of those names may be directory
           names.

           A "FileRules directory" match will cause Swish-e to ignore all files and sub-
           directories in the current directory.

           Warning: A match with "FileMatch directory" says to index everything in the *current*
           directory and ignore any FileRules for this directory.

           Example:

               # Don't index any directories (and sub directories) that contain
               # a file (or sub-directory) called "index.skip"
               FileRules directory contains ^index\.skip$

               # Don't index directories that contain a .htaccess file.
               FileRules directory contains ^\.htaccess

           Note: While processing directories, Swish-e will ignore any files or directories that
           begin with a dot (".").  You may index files or directories that begin with a dot by
           specifying their name with "IndexDir" or "-i".

           "title" checks for a pattern match in an HTML title.

           Example:

               FileRules title contains construction example pointers

               # This example says to ignore case
               FileRules title regex "/^Internal document/i"

           Note: "FileRules title" works for any input method (fs, prog, or http) that is parsed
           as HTML, and where a title was found in the document.

           In case all this seems a bit confusing, processing a directory happens in the
           following order.

           First the directory name is checked:

               FileRules dirname - reject entire directory if matches

           Next the directory is scanned and each file name (which might be the name of a
           sub-directory) is checked:

               FileRules directory - reject entire dir if *any* files match
               FileMatch directory - accept entire dir if *any* files match

           Then, unless "FileMatch directory" matched, each file is tested with FileMatch.  A
           match says to index the file without further testing (i.e.  overrides FileRules and
           IndexOnly):

               FileMatch pathname  \
               FileMatch dirname   - file is accepted if any match
               FileMatch filename  /

           otherwise

               IndexOnly - file is checked for the correct file extension

               FileRules pathname  \
               FileRules dirname   - file is rejected if any match
               FileRules filename  /

           finally, the file is indexed.

           Files (not directories) listed with "IndexDir" or "-i" are processed in a similar way:

               FileMatch pathname  \
               FileMatch dirname   - file is accepted if any match
               FileMatch filename  /

           otherwise, the file is rejected if it doesn't have the correct extension or a
           FileRules matches.

               IndexOnly - file is checked for the correct file extension

               FileRules pathname  \
               FileRules dirname   - file is rejected if any match
               FileRules filename  /

           Note:  If things are not indexing as you expect, create a directory with some test
           files and use the "-T regex" trace option to see how file names are checked.  Start
           with very simple tests!

       Directives for the HTTP Access Method Only

       The HTTP Access method is enabled by the "-S http" switch when indexing.  It works by
       running a Perl program called SwishSpider which fetches documents from a web server.

       Only text files (content-type of "text/*") are indexed with the HTTP Access Method.  Other
       document types (e.g. PDF or MSWord) may be indexed as well.  The SwishSpider will attempt
       to make use of the SWISH::Filter module (included with the Swish-e distribution) to
       convert documents into a format that Swish-e can index.

       Note: The -S prog method of spidering (using spider.pl) can be a replacement for the -S
       http method.  It offers more configuration options and better spidering speed.

       These directives below are available when using the HTTP Access Method of indexing.

       MaxDepth *integer*
           MaxDepth defines how many links the spider should follow before stopping.  A value of
           0 configures the spider to traverse all links.  The default is MaxDepth 0.

               MaxDepth 5

           Note: The default was changed from 5 to 0 in release 2.4.0

       Delay *seconds*
           The number of seconds to wait between issuing requests to a server.  This setting
           allows for more friendly spidering of remote sites.  The default is 5 seconds.

               Delay 1

           Note: The default was changed from 60 to 5 seconds in release 2.4.0

       TmpDir *path*
           The location of a writable temp directory on your system.  The HTTP access method
           tells the Perl helper to place its files in this location, and the "-e" switch causes
           Swish-e to use this directory while indexing.  There is no default.

               TmpDir /tmp/swish

           If this directory does not exist or is not writable Swish-e will fail with an error
           during indexing.

           Note, the environment variables of "TMPDIR", "TMP", and "TEMP" (in that order) will
           override this setting.

       SpiderDirectory *path*
           The location of the Perl helper script called swishspider.  If you use a relative
           directory, it is relative to your directory when you run Swish-e, not to the directory
           that Swish-e is in.  The default is the location swishspider was installed.  Normally
           this does not need to be set.

               SpiderDirectory /usr/local/swish

       EquivalentServer *server alias*
           Often times the same site may be referred to by different names.  A common example is
           that often http://www.some-server.com and http://some-server.com are the same.  Each
           line should have a list of all the method/names that should be considered equivalent.
           Multiple EquivalentServer directives may be used.  Each directive defines its own set
           of equivalent servers.

               EquivalentServer http://library.berkeley.edu http://www.lib.berkeley.edu
               EquivalentServer http://sunsite.berkeley.edu:2000 http://sunsite.berkeley.edu

       Directives for the prog Access Method Only

       This section details the directives that are only available for the "prog" document source
       feature of Swish-e.  The "prog" access method runs an external program that "feeds"
       documents to Swish-e.  This allows indexing and filtering of documents from any source.

       See prog - general purpose access method in the SWISH-RUN man page for more information.

       A number of example programs for use with the "prog" access method are provided in the
       prog-bin directory.  Please see those example if you have questions about implementing a
       "prog" input program.

       SwishProgParameters *list of parameters*
           This is a list of parameters that will be sent to the external program when running
           with the "prog" document source method.

               SwishProgParameters /path/to/config hello there
               IndexDir /path/to/program.pl

           Then running:

               swish-e -c config -S prog

           Swish-e will execute "/path/to/program.pl" and pass "/path/to/config hello there" as
           three command line arguments to the program.  This directive makes it easy to pass
           settings from the Swish-e configuration file to the external program.

           For example, the "spider.pl" program (included in the "prog-bin" directory) uses the
           "SwishProgParameters" to specify what file to read for configuration information.

               SwishProgParameters spider.config
               IndexDir ./spider.pl

           The "spider.pl" program also has a default action so you can avoid using a
           configuration file:

               SwishProgParameters default http://www.swishe.org/ http://some.other.site/
               IndexDir ./spider.pl

           And the spider program will use default settings for spidering those sites.

           Swish-e can read documents from standard input, so another way to run an external
           program with parameters is:

               ./spider.pl spider.conf ⎪ ./swish-e -S prog -i stdin

       Notes when using MS Windows

       You should use unix style path separators to specify your external program.  Swish will
       convert forward slashes to backslashes before calling the external program.  This is only
       true for the program name specified with "IndexDir" or the "-i" command line option.

       In addition, Swish-e will make sure the program specified actually exists, which means you
       need to use the full name of the program.

       For example, to run the perl spider program spider.pl you would need a Swish-e
       configuration file such as:

           IndexDir e:/perl/bin/perl.exe
           SwishProgParameters prog-bin/spider.pl default http://swish-e.org

       and run indexing with the command:

           swish-e -c swish.cfg -S prog -v 9

       The "IndexDir" command tells Swish-e the name of the program to run.  Under unix you can
       just specify the name of the script, since unix will figure out the program from the first
       line of the script.

       The "SwishProgParameters" are the parameters passed to the program specified by "IndexDir"
       (perl.exe in this case).  The first parameter is the perl script to run
       (prog-bin/spider.pl).  Perl passes the rest of the parameters directly to the perl script.
       The second parameter default tells the spider.pl program to use default settings for
       spidering (or you could specify a spider config file -- see "perldoc spider.pl" for
       details), and lastly, the URL is passed into the spider program.

       Document Filter Directives

       Internally, Swish-e knows how to parse only text, HTML, and XML documents.  With "filters"
       you can index other types of documents.  For example, if all your web pages are in gzip
       format a filter can uncompress these on the fly for indexing.

       You may wish to read the Swish-e FAQ question on filtering before continuing here.  How Do
       I filter documents?

       There are two suggested methods for filtering.

       Filtering with SWISH::Filter

       The Swish-e distribution includes a Perl module called SWISH::Filter and individual
       filters located in the filters directory.  This system uses plug-in filters to extend the
       types of documents that Swish-e can index.  The plug-in filters do not actually do the
       filtering, but rather provide a standard interface for accessing programs that can filter
       or convert documents.  The programs that do the filtering are not part of the Swish-e
       distribution; they must be downloaded and installed separately.

       The advantage of this method is that new filtering methods can be installed easily.

       This system is designed to work with the -S http and -prog methods, but may also be used
       with the "FileFilter" feature and -S fs indexing method.  See
       $prefix/share/doc/swish-e/examples/filter-bin/swish_filter.pl for an example.

       See the filters/README file for more information.

       Filtering with the FileFilter feature

       A filter is an external program that Swish-e executes while processing a document of a
       given type.  Swish-e will execute the filter program for each file that matches the file
       suffix (extension) set in the FileFilter or FileFilterMatch directives.  FileFilterMatch
       matches using regular expressions and is described below.

       Filters may be used with any type of input method (i.e. -S fs, -S http, or -S prog).  But
       because

       Swish-e calls the external program passing as default arguments:

       $0  the name of the filter program

       $1  the physical path name of the file to read.  This may be a temporary file location if
           indexing by the http method.

       $2  When indexing under the file system this will be the same as $1 (the path to the
           source file), but when indexing under the http method this will be the URL of the
           source document.

       Swish-e can also pass other parameters to the filter program.  These parameters can be
       defined using the FileFilter or FileFilterMatch directives.  See Filter Options below.

       The filter program must open the file, process its contents, and return it to Swish-e by
       printing to STDOUT.

       Note that this can add a significant amount of time to the indexing process if your
       external program is a perl or shell script.  If you have many files to filter you should
       consider writing your filter in C instead of a shell or perl script, or using the "prog"
       Access Method along with SWISH::Filter.

       FilterDir  *path-to-directory*
           Deprecated.

           This is the path to a directory where the filter programs are stored.  Swish-e looks
           in this directory to find the filter specified in the FileFilter directive.

           This directive is not needed if the filter program can be found in your system's path.
           Even if your filter is not in your system's path you can specify the full path to the
           filter in the FileFilter or FileFilterMatch directives.

           Example:

               FilterDir /usr/local/swish/filters

       FileFilter   *suffix*   "filter-prog"   ["filter-options"]
           This maps file suffix (extension) to a filter program.  If filter-prog starts with a
           directory delimiter (absolute path), Swish-e doesn't use the FilterDir settings, but
           uses the given filter-prog path directly.

           On systems that have a working fork(2) system call the filter program is run by
           forking swish then executing the filter.  This mean the shell is not used for running
           the filter and no arguments are passed through the shell.

           On other systems (e.g. Windows) the arguments are double-quoted and popen(3) is used
           to run the program.  This does pass argument though the shell and may be a security
           concern depending on the abilities of the shell.

           Filter options:

           Filter options are a string passed as arguments to the filter-prog.  Filter options
           can contain variables, replaced by Swish-e.  If you omit filter-options Swish-e will
           use default parameters for the options listed above.

               Default:      %p %P
               Which means:  pass   "workfile path" and "documentfile path" to filter.

           Variables in filter options:

               %%   =  %
               %P   =  Full document pathname (e.g. URL, or path on filesystem)
               %p   =  Full pathname to work file (maybe a tmpfile or the real document path on filesystem)
               %F   =  Filename stripped from full document pathname
               %f   =  Filename stripped from "work" pathname
               %D   =  Directoryname stripped from full document pathname
               %d   =  Directoryname stripped from full "work" pathname

           Examples of strings passed:

               %P =  document pathname:  http://myserver/path1/mydoc.txt
               %p =  work pathname:      /tmp/tmp.1234.mydoc.txt
               %F =     mydoc.txt
               %f =     tmp.1234.mydoc.txt
               %D =     http://myserver/path1
               %d =     /tmp

           Notes when using MS Windows

           Windows uses double quotes to escape shell metacharacters, so if you need to use
           quotes then use single quotes around the entire option string.

               FileFiler .mydoc mydocfilter.exe '--title "text with spaces"'

           You can specify the filter program using forward slashes (unix style).  Swish will
           convert the slashes to backslashes before running your program.

               FileFilter .mydoc     c:/some/path/mydocfilter.exe  '-d "%d" -example -url "%P" "%f"'

           Examples of filters:

               FileFilter .doc       /usr/local/bin/catdoc "-s8859-1 -d8859-1 %p"
               FileFilter .pdf       pdftotext   "%p -"
               FileFilter .html.gz   gzip  "-c %p"
               FileFilter .mydoc     "/some/path/mydocfilter"  "-d %d -example -url %P %f"

           The above examples are running a binary filter program.  For more complicated
           filtering needs you may use a scripting language such as Perl or a shell script.
           Here's some examples of calling a shell and perl script:

               FileFilter .pdf       pdf2html.sh
               FileFilter .ps        ghostscript-filter.pl

           Using a scripting language (or any language that has a large startup cost) can greatly
           increase the indexing time.  For small indexing jobs, this may not be an issue, but
           for large collections of files that require processing by a scripting language, you
           may be better off using the "-S prog" access method where the script will only be
           compiled once, instead of for each document.

           Filters are probably easier to write than a "-S prog" program.  Which you decide to
           use depends on your requirements.  Examples of filter scripts can be found in the
           filter-bin directory, and examples of "-S prog" programs can be found in the prog-bin
           directory.

       FileFilterMatch   *filter-prog*   *filter-options*  *regex* [*regex* ...]
           This is similar to "FileMatch" except uses regular expressions to match against the
           file name.  *filter-prog* is the path to the program.  Unlike "FileFilter" this does
           not use the "FilterDir" option.  Also unlike "FileFilter" you must specify the
           *filter-options*.

           Examples:

               FileFilterMatch ./pdftotext "%p -" /\.pdf$/

           Note that will also match a file called ".pdf", so you may want to use something that
           requires a filename that has more than just an extension.  For example:

               FileFilterMatch ./pdftotext "%p -" /.\.pdf$/

           To specify more than one extension:

               FileFilterMatch ./check_title.pl "%p" /\.html$/  /\.htm$/

           Or a few ways to do the same thing:

               FileFilterMatch ./check_title.pl %p /\.(html⎪html)$/
               FileFilterMatch ./check_title.pl %p /\.html?$/

           And to ignore case:

               FileFilterMatch ./check_title.pl %p /\.html?$/i

           You may also precede an expression with "not" to negate regular expression that
           follow.  For example, to match files that do not have an extension:

               FileFilterMatch ./convert "%p %P" not /\..+$/

Document Info

       $Id: SWISH-CONFIG.pod 1846 2006-10-20 20:18:30Z whmoseley $

       .