XSLT 2.0 implementation

The href attribute of xsl:result-document is now interpreted as a relative URI, relative to the system ID of the principal result document. This works only where the system ID of the principal output is known, and uses the "file://" protocol. The result document is no longer created relative to the current working directory, for security reasons (it causes problems when executing an untrusted stylesheet in a servlet environment).

Note that when Saxon is invoked from the command line, the -o option should be used to specify the principal output destination. This will ensure that a suitable system ID is available. If the result document is sent to the standard output stream (even if this is redirected to a file), Saxon will not know the system identifier and will therefore be unable to create a secondary output destination using a relative URI. It is still possible, of course, to specify an absolute URI as the value of the href attribute - note that this must be a URL, not a filename, so it will typically start with file://.

It is now possible to specify an OutputURIResolver to be used to resolve the URI specified in the href attribute of the xsl:result-document element. This will be used in place of the standard output URI resolver. The OutputURIResolver is called when writing of the output document starts, at which point it must return a JAXP Result object to act as the output destination. It is called again when writing of an output document is complete. You can nominate an OutputURIResolver by calling ((Controller)transformer).setOutputURIResolver(new UserOutputResolver()), or by calling factory.setAttribute("http://saxon.sf.net/feature/outputURIResolver", new UserOutputResolver()).

If the -t option is used, a message is written to the standard error output identifying the files written using using xsl:result-document.

It is now an error to use xsl:result-document when the current output destination is a temporary tree.

The meaning of the configuration property ALLOW_EXTENSION_FUNCTIONS has been extended so that setting the value to false also disables extension elements and the creation of multiple output files. This is because all these operations carry similar risks when a servlet is allowed to execute untrusted stylesheets.

Added support for the separator attribute of <xsl:copy-of>.

The current() function may now be used in a pattern (specifically, within a predicate). Its value is the node being tested against the pattern. For example, match="*[*[name()=name(current())]" matches any element that contains another element with the same name.

A global variable or parameter may now be used in the match pattern of xsl:template, provided that it does not cause a circularity (that is, it must be possible to evaluate the variable without calling xsl:apply-templates)

A global variable or parameter may now be used in the match pattern or the use expression of xsl:key, provided that it does not cause a circularity (that is, it must be possible to evaluate the variable without using the key() function against the key being defined)

The key() function may now be used in the use or match attributes of xsl:key, provided the key definitions are not circular. (For example, key k1 can be defined in terms of key k2, provided that k2 is not defined in terms of k1.)

The group-ending-with attribute of xsl:for-each-group is implemented. It is especially useful where the last node in each group carries some kind of marker, for example continued="no".

Added attribute default="yes"|"no" to saxon:collation, to specify whether this collation should be used as the default collation. If more than one collation is specified as the default, the last one wins. If no default collation is specified, Unicode codepoint collation is used. The default collation is used by the compare() function if no third argument is supplied, by xsl:sort if no collation is specified (for data type text or string), and also by the comparison operators =, !=, <, >, etc.

The collation name is now a URI, not a QName.

Sorting and comparison according to Unicode codepoints can be achieved by setting up a collator as <saxon:collation name="unicode" class="net.sf.saxon.sort.CodepointCollator"/>