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Langue: en

Version: 4 Aug 2000 (fedora - 04/07/09)

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Section: 1 (Commandes utilisateur)


xref - generate cross-references inside and between HTML files


xref [ -x ] [ -b base ] [ -i index ] [ -- ] [ input [ output ] ]


The xref 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 xref 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:
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 "http://xyz/#b-box".
-i index
Directs xref 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 ovrride terms found in index. This allows xref 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:
The name of an HTML file. If absent, standard input is read instead. The special name "-" also indicates standard input. The input may be a URL.
The file to write to. If absent, standard output is used. This may not be a URL.


The following exit values are returned:
Successful completion.
An error occurred in the parsing of the HTML file. toc will try to correct the error and produce output anyway.


index(1), num(1), toc(1), normalize(1), xml2asc(1) asc2xml(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.

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