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>...
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".
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 override 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.