A quick query about the 'value' of a p:with-option's select expression.

Where I invoke an XProc step thus (passing a sequence in the
'collection' option):


<ato:retrieveEntry env="int">
  <p:with-option name="collection" select="('foo', 'bar')"/>
</ato:retrieveEntry>


and within the step declaration I attempt to process the 'collection'
option thus:


<p:add-attribute match="/c:request" attribute-name="href">
  <p:with-option name="attribute-value"
      select="concat('http://api.', 
                       $env,
                       '.somewhere.co.uk/atomstore/',
                       string-join(($collection), '/')
                     )"/>
</p:add-attribute>


I notice that the string-join on the sequence ('foo', 'bar') returns
'foobar' instead of 'foo/bar' which is what I'd have expected.

Given that I have set xpath-version="2.0", am I right in assuming that a
sequence returned by an XPath expression, in this context, is
automatically concatenated to a single xs:untypedAtomic value rather
than honouring the sequence as it is declared?

Is there an explanation for this behaviour?


I'm using Calabash 0.9.10.




Regards

Philip Fennell

>XML Developer (The Forge)
>
>BBC Future Media & Technology
>Media Village, 201 Wood Lane London W12 7TP
>BC4 C4, Broadcast Centre
>
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Received on Monday, 22 June 2009 14:56:12 UTC