[Bug 1308] proposal: merge xsl:perform-sort and xsl:sequence

http://www.w3.org/Bugs/Public/show_bug.cgi?id=1308





------- Additional Comments From mike@saxonica.com  2005-05-13 18:19 -------
We discussed this on 12 May without coming to a firm conclusion: the outstanding
technical question was what we should do about an xsl:perform-sort instruction
containing a sequence constructor (which is allowed by xsl:perform-sort but not
by xsl:sequence). 

I suggested during the telcon that

<xsl:perform-sort>
  <xsl:sort select="..."/>
  <instructions>...
</xsl:perform-sort>

is equivalent to

<xsl:for-each select=".">
  <xsl:sort select="..."/>
  <instructions>...
</xsl:perform-sort>

but I was wrong: the second case computes sort keys from the input sequence (.),
not from the output sequence.

I think my instinct now is to leave it alone. It ain't broke, and fixing things
that ain't broke during the end game always risks introducing bugs.

Michael Kay