hxref - generate cross-references inside and between HTML files
hxref [ -x ] [ -b base ] [ -i index ] [ -- ] [ input [ output ] ]
The hxref command links inline elements to DFN elements with the same
content. It adds ID attributes where necessary. If the content of a
DFN or other element isn’t suitable, the TITLE attribute may be used to
provide the term to use for comparisons.
Here is an example:
<p>A <dfn>b-box</dfn> is defined to be...
<p>For every b there is a <em>b-box</em>...
The output of hxref will be similar to this:
<p>A <dfn id="b-box">b-box</dfn> is defined to be...
<p>For every b there is a <em><a href="#b-box">b-box<a/></em>...
The following options are supported:
-x Use XML conventions: empty elements are written with a slash
at the end: <IMG />
-b base Sets the prefix for the generated URLs. By default base is
empty, which generates URLs like "#b-box" above. If base is
set to, e.g., "http://xyz/", the URLs will look like
-i index Directs hxref to read terms from a database file before
looking for them in the document and afterwards store the
terms that were found in the same file. DFN element in the
document override terms found in index. This allows hxref to
be run multiple times on different files, to make the files
refer to each other. It may be necessary to run the commands
twice, to resolve all cross-references.
The following operands are supported:
input The name of an HTML file. If absent, standard input is read
instead. The special name "-" also indicates standard input.
The input may be an URL.
output The file to write to. If absent, standard output is used.
This may not be a URL.
The following exit values are returned:
0 Successful completion.
> 0 An error occurred in the parsing of the HTML file. hxtoc
will try to correct the error and produce output anyway.
asc2xml(1), hxindex(1), hxnormalize(1), hxnum(1), hxtoc(1), xml2asc(1)
The error recovery for incorrect HTML is primitive.
The program generates ID attributes, but doesn’t generate <a name=...>
tags, so the links only work in browsers that recognize ID attributes.