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RE: Proposal: Copying with Sorting

2003-01-06 05:54:15
Thank you Mike,

XSLT 2.0 allows you to create a sorted sequence of nodes using the
sort() function, with named sort keys:

<xsl:sort-key name="sk1">
  <xsl:sort select="exp2"/>
</xsl:sort-key>

<xsl:copy-of select="sort('sk1', exp)"/>

This is really great. 

Due to the global scope of a sort key and the brevity of the 
spec on sort keys and the sort() function, there are still 
some questions:

1. Are there any limitations on exp2 above? Would it be 
allowed to contain xsl:variable references, xsl:function 
references or the key() function?

It can contain all these things, subject to the general rules that
disallow circular references.

2. Would it be possible for exp2 to contain a reference to a 
locally defined xsl:variable (not a top-level one)?

No, the xsl:sort-key element is top-level, so there will be no
locally-defined variables in scope. Do you have a use case where this
creates a problem?

Michael Kay
Software AG
home: Michael(_dot_)H(_dot_)Kay(_at_)ntlworld(_dot_)com
work: Michael(_dot_)Kay(_at_)softwareag(_dot_)com 


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