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+<refentry id="pixels.per.inch">
+<refmeta>
+<refentrytitle>pixels.per.inch</refentrytitle>
+<refmiscinfo role="type">integer</refmiscinfo>
+</refmeta>
+<refnamediv>
+<refname>pixels.per.inch</refname>
+<refpurpose>How many pixels are there per inch?</refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+<src:fragment id='pixels.per.inch.frag'>
+<xsl:param name="pixels.per.inch" select="90"/>
+</src:fragment>
+</refsynopsisdiv>
+
+<refsect1><title>Description</title>
+
+<para>When lengths are converted to pixels, this value is used to
+determine the size of a pixel. The default value is taken from the
+<ulink url="http://www.w3.org/TR/xsl/slice5.html#pixels">XSL
+Recommendation</ulink>.
+</para>
+
+</refsect1>
+</refentry>