Re: [xsl] Adjacent grouping?

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

On 17.11.2017 18:43, rus tle profrustyleafiii@xxxxxxxxxxx wrote:

> I am trying toB remove attributeB values in a listB based on a frequency 
> parameter.
>
> Is this possibleB in XSLT 2? I cannot see how to tackle 
> theB problemB without being able to store the last attributeB value 
> addedB to the result tree so that I can compare against it for the 
> following attribute values? I am told that there is no way to query the 
> result tree and so I am at a loss as to whether XSLT can actually do 
> what I require?
>
> To illustrate, please see the example below.
>
> The frequencyB parameter is 30. I would like to remove all values that 
> are "within 30" of the last value used. If the first value is 0 then I 
> would like to remove all the following attribute values that are less 
> than 30 plus the last value added to the result tree (in this case 0). 
Such a condition can be easier formulated in XQuery 3 with a window 
clause https://www.w3.org/TR/xquery/#id-tumbling-windows

for tumbling window $w in p/Content
start $s when true()
end next $n when xs:decimal($n/@value) - xs:decimal($s/@value) ge 30
return ($w[1], subsequence($w, 2)/<Content value=""/>)

I think than in XSLT with group-adjacent.

As most people use XSLT 2 with Saxon 9 and Saxon also implements XQuery 
that might be an option that I think is worth mentioning.

In XSLT 3 you could even call directly into an XQuery module using above 
window clause if needed with 
https://www.w3.org/TR/xpath-functions/#func-load-xquery-module.