Get the properties corresponding to the effective xsl:output element.
The object returned will
be a clone of the internal values. Accordingly, it can be mutated
without mutating the Templates object, and then handed in to
The properties returned should contain properties set by the stylesheet,
and these properties are "defaulted" by default properties specified by
section 16 of the
XSL Transformations (XSLT) W3C Recommendation. The properties that
were specifically set by the stylesheet should be in the base
Properties list, while the XSLT default properties that were not
specifically set should be in the "default" Properties list. Thus,
getOutputProperties().getProperty(String key) will obtain any
property in that was set by the stylesheet, or the default
getOutputProperties().get(String key) will only retrieve properties
that were explicitly set in the stylesheet.
Value Templates attribute values will
be returned unexpanded (since there is no context at this point). The
namespace prefixes inside Attribute Value Templates will be unexpanded,
so that they remain valid XPath values.