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[xsl] Retrieving sequence of unique strings from another sequence

2010-01-05 12:41:37
I have a sequence of strings, e.g., ('abc', 'def', 'def', 'ghi'), and I want to 
create a new sequence that will have only the unique strings in it.  The XSL 
2.0 function distinct-values is not what I want because:

  <xsl:variable name="list" as="xsd:string*" select="('abc', 'def', 'def', 
'ghi')" />
  <xsl:variable name="uniq" as="xsd:string*" select="distinct-values($list)" />

will result in a sequence of ('abc', 'def', 'ghi') which is not what I'm 
looking for.  What I am looking for is the sequence ('abc', 'ghi').  Unix 
people will recognize that distinct-values() returns the result of the uniq 
command without any options.  While what I'm looking for is the result of the 
uniq command with the -u option.

Can anyone suggest how I might use one or more XSL 2.0 functions to return only 
the unique strings.


Thanks, Andy.



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