Re: [xsl] streaming XSLT creating a header from a first record

On 08.05.2018 17:19, Geert Bormans geert(_at_)gbormans(_dot_)telenet(_dot_)be 
wrote:
> All,
>
> I have a potentially huge tabular structure in an XML file: one "table'' 
> element, many "row" elements, each having a series of attributes
> I want to process them using a streaming XSLT, but I am hitting an issue
>
> I want to use information from the first row in a header construct, in a 
> way using the first row information twice
> That is fairly easy done if the result were something like CSV, because 
> then I can deal with the header and first row in one go
> but now I need the header in some sort of metadata section at the start 
> of the document
> and all the rows including row one in an adjacent structure, but wrapped 
> (the results of the row processing in a container)
> I tried to create the full structure in a template for the first row and 
> process the following siblings of the first row... but that can't be 
> done "when the context posture is striding" (sic)
> Any ideas? Thanks,
How about setting up an accumulator

<xsl:accumulator name="first-row-values" as="map(xs:string, xs:string)" 
initial-value="map{}" streamable="yes">
  <xsl:accumulator-rule match="table/row[1]"
     select="map:merge(@*!map { node-name() : data(.) })"/>
</xsl:accumulator>

then you can use that map in all following rows.
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