Re: [xsl] Accumulator use

["Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

cmarchand@xxxxxxxxxx wrote:

> I try to cache values who are in external files referenced from my
> source file :
>
> source.xml
> ------------
> <root><input href="1.xml"/><input href="2.xml"/>...</root>
>
> n.xml
> ------
> <root type="typeN">...</root>
>
> I want to create a map(xs:anyUri, xs:string), where key is the external
> file URI, and value is always /*/@type in the file

If the files are huge but you only need the @type attribute of the root 
element then using `xsl:iterate` and `xsl:break` for an early exit, as 
described in 
http://saxonica.com/html/documentation/sourcedocs/streaming/partial-reading.html 
might be the best approach to avoid parsing the large documents.

> External files may be huge, and I'd like to stream them. I create an
> accumulator, stream input files using this accumulator.
>
> <xsl:accumulator name="acc" as="map(xs:string, xs:string)"
> initial-value="map{}">
>     <xsl:accumulator-rule match="*[@value]">
>        <xsl:sequence select="map:put($value, ./local-name(),
> xs:string(./@value))"/>
>     </xsl:accumulator-rule>
> </xsl:accumulator>

Above you say map(xs:anyUri, xs:string) with the key being the file URI, 
so why is the accumulator map(xs:string, xs:string) and stores the local 
name and not the URI?

> <xsl:mode name="m" streamable="yes"/>
>
> <xsl:template match="/">
>     <xsl:stream href="../../test/resources/entries.xml"
> use-accumulators="acc">
>        <xsl:apply-templates mode="m"/>
>     </xsl:stream>
>     <!-- do here something that uses the accumulator -->
> </xsl:template>

Where do you parse the referenced files?