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<refentry id="insert.olink.pdf.frag">
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<refmeta>
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<refentrytitle>insert.olink.pdf.frag</refentrytitle>
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<refmiscinfo role="type">boolean</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>insert.olink.pdf.frag</refname>
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<refpurpose>Add fragment identifiers for links into PDF files</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<src:fragment id='insert.olink.pdf.frag.frag'>
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<xsl:param name="insert.olink.pdf.frag" select="0"/>
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</src:fragment>
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</refsynopsisdiv>
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<refsect1><title>Description</title>
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<para>The value of this parameter determines whether
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the cross reference URIs to PDF documents made with
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<sgmltag>olink</sgmltag> will
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include fragment identifiers.
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</para>
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<para>When forming a URI to link to a PDF document,
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a fragment identifier (typically a '#' followed by an
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id value) appended to the PDF filename can be used by
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the PDF viewer to open
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the PDF file to a location within the document instead of
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the first page.
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However, not all PDF files have id
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values embedded in them, and not all PDF viewers can
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handle fragment identifiers.
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</para>
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<para>If <parameter>insert.olink.pdf.frag</parameter> is set
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to a non-zero value, then any olink targeting a
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PDF file will have the fragment identifier appended to the URI.
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The URI is formed by concatenating the value of the
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<parameter>olink.base.uri</parameter> parameter, the
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value of the <sgmltag class="attribute">baseuri</sgmltag>
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attribute from the <sgmltag class="element">document</sgmltag>
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element in the olink database with the matching
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<sgmltag class="attribute">targetdoc</sgmltag> value,
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and the value of the <sgmltag class="attribute">href</sgmltag>
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attribute for the targeted element in the olink database.
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The <sgmltag class="attribute">href</sgmltag> attribute
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contains the fragment identifier.
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</para>
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<para>If <parameter>insert.olink.pdf.frag</parameter> is set
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to zero (the default value), then
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the <sgmltag class="attribute">href</sgmltag> attribute
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from the olink database
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is not appended to PDF olinks, so the fragment identifier is left off.
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A PDF olink is any olink for which the
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<sgmltag class="attribute">baseuri</sgmltag> attribute
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from the matching <sgmltag class="element">document</sgmltag>
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element in the olink database ends with '.pdf'.
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Any other olinks will still have the fragment identifier added.
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</para>
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</refsect1>
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</refentry>
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