<refentry xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xmlns:xi="http://www.w3.org/2001/XInclude"
          xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
          xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
          version="5.0" xml:id="bibliography.collection">
<refmeta>
<refentrytitle>bibliography.collection</refentrytitle>
<refmiscinfo class="other" otherclass="datatype">string</refmiscinfo>
</refmeta>
<refnamediv>
<refname>bibliography.collection</refname>
<refpurpose>Name of the bibliography collection file</refpurpose>
</refnamediv>

<refsynopsisdiv>
<src:fragment xml:id="bibliography.collection.frag">
<xsl:param name="bibliography.collection">http://docbook.sourceforge.net/release/bibliography/bibliography.xml</xsl:param>

</src:fragment>
</refsynopsisdiv>

<refsection><info><title>Description</title></info>

<para>Maintaining bibliography entries across a set of documents is tedious, time
consuming, and error prone. It makes much more sense, usually, to store all of
the bibliography entries in a single place and simply <quote>extract</quote>
the ones you need in each document.</para>

<para>That's the purpose of the
<parameter>bibliography.collection</parameter> parameter. To setup a global
bibliography <quote>database</quote>, follow these steps:</para>

<para>First, create a stand-alone bibliography document that contains all of
the documents that you wish to reference. Make sure that each bibliography
entry (whether you use <tag>biblioentry</tag> or <tag>bibliomixed</tag>)
has an ID.</para>

<para>My global bibliography, <filename>~/bibliography.xml</filename> begins
like this:</para>

<informalexample>
<programlisting>&lt;!DOCTYPE bibliography
  PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
  "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"&gt;
&lt;bibliography&gt;&lt;title&gt;References&lt;/title&gt;

&lt;bibliomixed id="xml-rec"&gt;&lt;abbrev&gt;XML 1.0&lt;/abbrev&gt;Tim Bray,
Jean Paoli, C. M. Sperberg-McQueen, and Eve Maler, editors.
&lt;citetitle&gt;&lt;ulink url="http://www.w3.org/TR/REC-xml"&gt;Extensible Markup
Language (XML) 1.0 Second Edition&lt;/ulink&gt;&lt;/citetitle&gt;.
World Wide Web Consortium, 2000.
&lt;/bibliomixed&gt;

&lt;bibliomixed id="xml-names"&gt;&lt;abbrev&gt;Namespaces&lt;/abbrev&gt;Tim Bray,
Dave Hollander,
and Andrew Layman, editors.
&lt;citetitle&gt;&lt;ulink url="http://www.w3.org/TR/REC-xml-names/"&gt;Namespaces in
XML&lt;/ulink&gt;&lt;/citetitle&gt;.
World Wide Web Consortium, 1999.
&lt;/bibliomixed&gt;

&lt;!-- ... --&gt;
&lt;/bibliography&gt;
</programlisting>
</informalexample>

<para>When you create a bibliography in your document, simply
provide <emphasis>empty</emphasis> <tag>bibliomixed</tag>
entries for each document that you wish to cite. Make sure that these
elements have the same ID as the corresponding <quote>real</quote>
entry in your global bibliography.</para>

<para>For example:</para>

<informalexample>
<programlisting>&lt;bibliography&gt;&lt;title&gt;Bibliography&lt;/title&gt;

&lt;bibliomixed id="xml-rec"/&gt;
&lt;bibliomixed id="xml-names"/&gt;
&lt;bibliomixed id="DKnuth86"&gt;Donald E. Knuth. &lt;citetitle&gt;Computers and
Typesetting: Volume B, TeX: The Program&lt;/citetitle&gt;. Addison-Wesley,
1986.  ISBN 0-201-13437-3.
&lt;/bibliomixed&gt;
&lt;bibliomixed id="relaxng"/&gt;

&lt;/bibliography&gt;</programlisting>
</informalexample>

<para>Note that it's perfectly acceptable to mix entries from your
global bibliography with <quote>normal</quote> entries. You can use
<tag>xref</tag> or other elements to cross-reference your
bibliography entries in exactly the same way you do now.</para>

<para>Finally, when you are ready to format your document, simply set the
<parameter>bibliography.collection</parameter> parameter (in either a
customization layer or directly through your processor's interface) to
point to your global bibliography.</para>

<para>A relative path in the parameter is interpreted in one
of two ways:</para>
<orderedlist numeration="loweralpha">
  <listitem>
    <para>If your document contains no links to empty bibliographic elements,
    then the path is relative to the file containing
    the first <tag>bibliomixed</tag> element in the document.</para>
  </listitem>
  <listitem>
    <para>If your document does contain links to empty bibliographic elements,
    then the path is relative to the file containing
    the first such link element in the document.</para>
  </listitem>
</orderedlist>
<para>Once the collection file is opened by the first instance described
above, it stays open for the current document
and the relative path is not reinterpreted again.</para>

<para>The stylesheets will format the bibliography in your document as if
all of the entries referenced appeared there literally.</para>

</refsection>
</refentry>