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Re: Processing IDREFS attributes

2005-11-01 15:23:01
At 2005-11-01 13:00 -0800, Dan Vint wrote:
I've got a few places where I have an attribute of type IDREFS and a sequence of ID values like references="Location Party Organization". I had thought a simple for-each loop would pull these apart with the id() function, in something like this:

<xsl:for-each select="id(@references)">
        <xsl:value-of select="."/>
</xsl:for-each>

Close ....

But it doesn't work. What I get is the content of @references with the above.

Really? I would have thought you'd get the concatenation of the element content of the referenced elements.

The only other solution I have thought about is creating a template and recursively pulling apart the string. This should work, but I would think there is a simpler way to make this work. Is there a solution I missed?

*If* you have properly declared the id attributes, for my example they are called id=, something along the lines of:

  <!ATTLIST foo id ID #IMPLIED>

then you should be able to say:

  <xsl:for-each select="id(@references)/@id">
    <xsl:if test="position()>1"> </xsl:if>
    <xsl:value-of select="."/>
  </xsl:for-each>

and it would report a space-separated list of unique token values (rather than just @references since that might have duplicates).

If you don't have a declaration of the attribute type, then id() has nothing to look up and will always return an empty node set.

I hope this helps, Dan.

. . . . . . . . . Ken

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