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instant - manipulates ESIS from parsed SGML instance
instant [ -bhuvxHISW ] [ -t file] [ -s file] [ -c file] [ -o file]
[ -D variable=value ...] [ -i id] [ -l directory] [file]
The instant program manipulates an SGML document instance in a variety
of ways, including translating into a form suitable for a formatting
application and printing information about this instance. Input to
instant is the output of nsgmls, whose format is called Element
Structure Information Set (ESIS).
The following are the possible command line options to instant. Output
is sent to the standard output, except where otherwise noted.
Translate the SGML instance to another form, usually suitable
for a formatting application. The file is called a translation
spec, which specifies how the tags are to be translated. See
transpec(5). By convention, names for file use the suffix .ts,
for translation spec.
Specifies a file of mappings for SDATA entities in the instance.
The file is of two columns, separated by one or more tabs.
Spaces can not be used as the separator because spaces are
allowable as the content of the columns. The first column is
the entity data to map, the second is the string that the data
is mapped to. The entity data is typically what is found in
public ISO entity sets, such as the General Technical and
Publishing sets. The mappings are specific to the formatting
application used. For example, to map the em dash entity,
[mdash ], in the Publishing set to the TeX representation, the
first column would be [mdash ] and the second column ---. Lines
beginning with a # are comments, and are ignored. Empty lines
are also ignored.
Specifies a file of string mappings for characters in the
instance. The file is of two columns, separated by white space.
The first is the character to map, the second is the string that
the character is mapped to. The mappings are specific to the
formatting application used. Lines beginning with a # are
comments, and are ignored. Empty lines are also ignored.
-d "Data hack" M strip newline at the beginning of data records
Set the threshold for the length, in characters, of an <Entry>,
over which it is called a block of filled text, to length.
Write all output (except error and warning messages) to file
file. By default, output goes to stdout.
-h Print a text representation of the hierarchy of the instance
elements. The deeper an element is in the tree, the more it is
indented. The data content is not printed.
-u Print a summary of the usage of each element in the instance.
Information given includes attributes, number of children, and
depth in the hierarchy.
-S Print some statistics about element usage in the instance,
including how often each element is used and how much PCDATA is
-x Print the context of each element in the instance, from each
element to the root of the document tree.
-v Validate the SGML instance based on the set of constraints or
descriptions in the transpec file. This flags tells instant to
turn off normal output, leaving only diagnostics.
Try to read the translation specs or other files from in the
directory directory if not found in the current directory. This
is called the library directory. The environment variable
TPT_LIB may also be used to specify this.
-b Interactive browser mode. The user is prompted for actions,
which include moving among and examining the various nodes in
the hierarchy of the instance, displaying information about
-I List the IDs of all elements in the instance that have an ID.
The format is more suitable for other programs than humans.
Lines show the ID, element GI, filename, and line, separated by
colons. (This depends on the -l option to nsgmls which provide
filenames and line numbers.)
-i id When translating the instance, begin processing at the element
whose ID is id instead of the topmost element.
Define the variable variable with value value.
-W Do not print warning messages.
-H Print a help message briefly describing the options.
file Read the instance from the file file. This is expected to be
the output of the program nsgmls. If not specified, instant
reads the instance from its standard input.
In some cases it makes no sense to combine options. This is especially
true if one of the options is to perform a translation. No checking is
done for this.
These are the commands to the interactive browser:
cd args ...
Change to a different element in the hierarchy. cd id id will
change to the element whose ID is id. cd N will change to the
Nth child element of the current element. Several values of N
may be specified, so the program will change to successively
descending elements in the hierarchy. The string .. may appear
for N to move up a level in the hierarchy (like in a unix file
system). A / may be specified for N to change to the top of the
cont Print the context of each element.
data N Show the data content (PCDATA, RCDATA, and DATA) of child node
Find paths to elements matching spec, where spec may be one of:
Find all elements whose parent element is gi.
Find all elements which have a child element gi.
gi gi Find all elements whose name is gi.
attr name value
Find all elements that have a attribute name that have a
id ID Show location of element whose ID is ID. If ID is ?, it will
list all IDs with the paths to them.
ls List information about the current element in the hierarchy.
This includes element name, line number in instance, context,
attributes and their values, child elements, data directly
within this element, and the order of the current element among
q relation element
Report whether or not the current element has the relation
relation to the named element element. Values of relation are
the same as for _followrel in transpec reference page.
stat Show statistics about the hierarchy.
sum Show a tag usage summary about the hierarchy.
tran transpec outfile
Write translated output using trans spec transpec to file
outfile. If outfile is not specified, output is sent to stdout.
tree Print a textual representation of the hierarchy of the instance,
where deeper elements are indented more.
where Show current position in the hierarchy.
Exits the program.
The stat, sum, tree, cont commands take an optional first argument (of
any value), which means to only consider the entire instance instead of
the hierarchy from the current element.
Translation specification file.
SDATA entity mapping file.
Character mapping file.
transpec(5), nsgmls(1), Standard Generalized Markup Language (SGML),
user cmd instant(1)