* {{Code|node()}}, containing the document itself.
Variables can be bound to a stylesheet via {{Code|$args}} (only strings are supported when using XSLT 3.0 and Saxon). The following {{Code|$options}} are available (currently, it is just a single one):
* {{Code|catalog}}: path to semicolon-separated list of XML catalog files (see [[Catalog Resolver]] for more information)
* {{Code|cache}}: cache XSLT transformer (speeds up repeated transformations, but increases memory consumption)
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