NAME

       hxaddid - add IDs to selected elements

SYNOPSIS

       hxaddid [ -x ] [--] elem|.class|elem.class [ file-or-URL ]

DESCRIPTION

       The  hxaddid  command  copies  an  HTML  or  XML file to standard output, while adding element IDs to the
       specified elements or classes.

       For example, given the input

           <p>A paragraph without an ID</p>

       the command

           hxaddid p

       will output

           <p id="a-paragraph">A paragraph without an ID</p>

       If you specify a class using .class then IDs will only be added to elements that contain that class.  And
       if  you  specify  an  element  and  a class using elem.class then IDs will only be added to the specified
       elements that contain the specified class.

       If two elements would naturally generate the same ID, a number is added to the ID name (starting with  0)
       to make sure the IDs are unique.  IDs are not added to matching elements that already contain an ID.

OPTIONS

       The following options are supported:

       -x        Use  XML  conventions: empty elements are written with a slash at the end: <IMG />. Also causes
                 the element to be matched case-sensitively.

OPERANDS

       The following operands are supported:

       elem      The name of element to select.

       .class    The name of class to select.

       elem.class
                 The name of element that contains class to select.

       file-or-URL
                 The name or URL of an HTML or XHTML file.

EXIT STATUS

       The following exit values are returned:

       0         Successful completion.

       > 0       An error occurred in the parsing of one of the HTML or XML files.

ENVIRONMENT

       To use a proxy to retrieve remote files, set the environment variables http_proxy  or  ftp_proxy.   E.g.,
       http_proxy="http://localhost:8080/"

BUGS

       Assumes  UTF-8 as input. Doesn't expand character entities. Instead pipe the input through hxunent(1) and
       asc2xml(1) to convert it to UTF-8.

       hxaddid tries first to generate "readable" IDs, by forming the ID out of the letters and digits found  in
       the content of the element and falls back to generating arbitrary IDs if it doesn't find enough. However,
       the algorithm in this version is primitive and only  gives  reasonable  results  for  ASCII  letters  and
       digits.

       Remote  files  (specified  with a URL) are currently only supported for HTTP. Password-protected files or
       files that depend on HTTP "cookies" are not handled. (You can use tools such as  curl(1)  or  wget(1)  to
       retrieve such files.)

SEE ALSO

       asc2xml(1), hxprune(1), hxnormalize(1), hxnum(1), hxtoc(1), hxunent(1), xml2asc(1), UTF-8 (RFC 2279)