Re: keys and collections

Michael Kay
Saxonica

Dear XSLT List,

Is it possible to use a key with a collection, along the lines of:

<xsl:variable name="allInput" select="collection('file:///path/?select=*.xml')/text/*"/>
<xsl:key name="linebyfolio" match="line" use="@folio"/>

And then, later:

key('linebyfolio',$folio,$allInput)

Using<oXygen/> 13.2 (configured to use Saxon-PE 9.3.0.5), this generates an error to the effect that: "A sequence of more than one item is not allowed as the third argument of key() (<title/>,<line/>, ...)." The children of the<text> elements in the collection are, indeed,<title> and<line> elements. Removing the "/text/*" from the path doesn't help; the error is then: "A sequence of more than one item is not allowed as the third argument of key() (document-node(), document-node(), ...)." I think I understand why this might be an error, but I seem to have a blind spot in figuring out how to work around it.

Thanks,

David
djbpitt@xxxxxxxxx