XSLT Reference |  |
XSLT Reference | |
This is a pretty obscure feature. It has only one use: writing an XSLT script that generates another XSLT script.
Since normally any tag whose name starts with xsl: is processed, we have to
provide a way to output a tag in the xsl: namespace without
processing it. The way we do this involves two steps:
You must declare two different prefixes
for the xsl:
namespace in the attributes of the <xsl:stylesheet> tag. One
prefix is declared as xsl:; you will use this
namespace for the elements that you want to process
as part of your stylesheet. The other prefix is used
to refer to the elements that you want to write to
the output document.
You must provide a top-level <xsl:namespace-alias>
element with a stylesheet-prefix
attribute whose value is the other prefix (besides
xsl:), and
whose result-prefix attribute
is "xsl".
For example, suppose your stylesheet starts this way:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:out-xsl=""http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml"/>
<xsl:namespace-alias stylesheet-prefix="out-xsl"
result-prefix="xsl"/>
...then elements in your stylesheet with namespace
xsl: will be
processed, and elements with namespace out-xsl: will be written to
the output document.