Re: [xsl] an error I do not understand

[Michael Kay <mike@xxxxxxxxxxxx>]

On 30/09/2011 01:07, Graydon wrote:
> So I've got a recurrent issue with taking big (~.5 Mlines, ~15 MiB)
> files of metadata and merging them, or updating them.
>
> (this happens in an XSLT 2.0 environment.)
>
> Below is the minimal case of the error I do not understand:
>
>
>      <xsl:for-each select="$areaNames">
>        <!-- F [Saxon-PE 9.3.0.5] Leading '/' cannot select the root node of the tree containing the context item: the context item is an atomic value -->
>        <xsl:sequence select="key('name2Area',current())"/>

There's an implicit third argument to key(), telling it which document 
to search. The default value is effectively "/" - that is, the document 
containing the context node. If there isn't a context, node, using "/" 
fails.

I must see if I can improve the error message (the problem is that Saxon 
expands the call at an early stage to use "/" explicitly, so the error 
message reflects the query as Saxon rewrote it, not the original as you 
wrote it.)

Michael Kay
Saxonica