[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Streaming and grouping in XSLT 3.0
Thanks Martin. That's a start :) As for the reason we want to use streaming, I guess the answer is both: - loading external documents such as http://dbpedia.org/resource/Copenhagen might result in large data volumes. Right now we are processing them in memory, but we are running out of it (not using high-end hardware), and the end-user experiences a noticeable delay since it is a run-time transformation. I think streaming could help address both of these issues. - many RDF triplestores/frameworks support streaming IO, which is becoming increasingly important when used with IoT devices etc. Our software provides UI over RDF data, and it will become a bottleneck if streaming is not supported. But it is also based on XSLT which we would like to continue using :) Martynas On Tue, Mar 21, 2017 at 12:20 PM, Martin Honnen martin.honnen@xxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > On 21.03.2017 11:44, Martynas JuseviD ius martynas@xxxxxxxxxxxx wrote: > >> Now my question is, how do I even begin analyzing the streamability of >> this approach in XSLT 3.0? I guess my main concern is that such >> grouping would not be streamable, but maybe there are other solutions? > > > As the stylesheet uses keys/Muenchian grouping it is true that keys can't be > used with streaming in XSLT 3.0. However a > <xsl:fork> > <xsl:for-each-group select="*[@rdf:about]" group-by="@rdf:about"> > is streamable as far as I understand it. > > On the other hand your post has not made it clear to me whether you want to > use streaming XSLT 3.0 because the XML input is so huge that the normal XSLT > 2.0 processing with an in-memory tree built first does not work (which is a > use case for XSLT 3.0 streaming) or whether somehow your input is streamed.
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