<scribe> chair: christian

<scribe> scribe: fsasaki

https://lists.w3.org/Archives/Public/public-rax/2016Jul/0004.html

new members

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action items

github link for rax cg is https://github.com/rax-w3c

input from quentin et al.

see https://lists.w3.org/Archives/Public/public-rax/2016Jul/0002.html

"One solution that we have used is to transform the RDF input (in any supported syntax) to be converted into a XML canonical form prior to applying XSLTs. "

<clange> help

processing RDF data in XML / xslt workflows

christian: also covered by one XML prague scenario

<quentin> canonical format new to be optimized for performance

christoph: similar solution is here https://lists.w3.org/Archives/Public/public-rax/2016Jul/0007.html
... has RDF abstraction layer, this is independent of RDF output serialization
... related: what RDF abstract serialization to use

collection of state of the art canonical representations of RDF in XML

quentin: you should always optimize canonical format that you are processsing

<clange> there is, e.g., RXR (Regular XML RDF), there is TriX, and there are more

quentin: XSLT is generally not enough, one needs libraries on top of XSLT

christian: "processing RDF data in XML / xslt workflows" - important topic, has several solutions, we need to collect info what works good, what not etc.

<clange> sources for the canonical formats mentioned above: RXR (https://www.dajobe.org/papers/xmleurope2004/), TriX (https://www.w3.org/2004/03/trix/, https://en.wikipedia.org/wiki/TriX_(syntax) )

<clange> AFAIK there is also a newer approach based on the SPARQL XML results format

https://github.com/rax-w3c

<clange> @fsasaki my GitHub account is "clange"

<TimeaT> my GitHub is theRealImy

<quentin> @fasaki my GitHub is qhreul

<scribe> ACTION: felix to add people to rax-cg github [recorded in http://www.w3.org/2016/07/08-rax-minutes.html#action01]

quentin: happy to do the description. won't be able to go through all material that christoph provided

christoph: happy to help

<scribe> ACTION: quention to start section on RDF data in XML / xslt workflows topic. christoph to add material [recorded in http://www.w3.org/2016/07/08-rax-minutes.html#action02]

TimeaT: previous problems, solutions were sent directly per mail. there was also a template, not sure how to send input

Christian: use the template, send to the list

<clange> BTW my colleagues will write up their two use cases (AutomationML Industry 4.0 and GATE NLP) by the next telco.

mapping XML of dictionary data to RDF

timea: dictionary company stores data in XML format, for further publishing. They wanted to bring XML into RDF, to be able to enrich dictionaries
... they can be multi- or monolingual, because language is complex
... need a way to convert XML to RDF
... for working with dictionaries you have to use lemon / ontolex, which may be extended
... solved currently with XSLT
... writing the XSLT proved to be very long and tedious
... not sure if we can achieve a general XSLT
... next step is how to connect words between dictionaries
... we reached very good point with XSLT, just wondering if there is a better way

felix: so no integration of RDF in XML needed?

timea: would have been desired, but dropped because XML mapping took a long time
... roundtripping is difficult
... not sure if it is needed

christoph: for making it easier to create XML / RDF translation, there are solutions
... I have developed something, felix has one
... so this should be a part: write a classification of existing libraries
... e.g. libraries that are based on XSLT. You start with that and it becomes hard to maintain, then people add an abstraction layer
... adding link to my implementation here

<quentin> for RDF -> XML, an approach could be to use SPARQL and XML templates

<quentin> ... essentially creating registere queries

<clange> https://github.com/EIS-Bonn/krextor is a library of XSLT templates and functions for XML to RDF

timea: we used "unified views", etl tool that read the XML and writes all data into virtuoso
... the actual mapping if endepend of unified views

<clange> @Timea see http://ceur-ws.org/Vol-449/ShortPaper2.pdf for an old, high-level overview

http://fsasaki.github.io/stuff/feisgiltt2016/

felix: currently purely XSLT based solution, without an abstraction layer

timea: classification of existing libraries, describe their drawbacks etc.

christoph: would contribute to such a section

<quentin> depending on the complexity of the transformation, you can use XPATH and templates to populate the RDF

<scribe> ACTION: timea to start section on existing tools & their classification, benefits and drawbacks - others to contribute [recorded in http://www.w3.org/2016/07/08-rax-minutes.html#action03]

quentin: you can also just use XPath and java @@@ and then are able to keep mappings
... you can do similar things from RDF > XML perspective, using SPARQL templates

timea: that sounds familiar how the XSLT is built; has a lot of templates
... we transformed the XML in a simple RDF, and then converted RDF into the model needed
... ontolex / lemon + extension

christioph: I have pointers to further systems, have seen a related paper
... will add a link here
... on roundtripping, let's not forget the XSParql specification
... it combines XQuery and SPARQL

<clange> SPARQL templates for RDF to XML have actually been implemented as a proper language: https://hal.inria.fr/hal-01150623/document. XSPARQL (http://xsparql.deri.org/) does a similar job but it's IMHO more suited for queries over XML or RDF or both at the same time, rather than transforming whole RDF graphs or whole XML documents.

christioph: it is better for query than complete transformation, but very interesting approaches

<quentin> there is an overlap between the two use-case in terms of transformation from 1 format to another

felix: asking john on mark logic support for RDF and how it fits into the picture

other sections & topics

nothing at the moment

next call in two weeks from now

same time

john: we are working on tech. to store RDF in XML
... also to make it easier to work with XML described by RDF graph
... interested to see in problems that people have and finding solutions

adjourned

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Guessing input format: RRSAgent_Text_Format (score 1.00)

Succeeded: s/tempaltes/templates/
Found Scribe: fsasaki
Inferring ScribeNick: fsasaki
Present: felix christian gerard john timea christoph quentin
Regrets: rob phil
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Guessing minutes URL: http://www.w3.org/2016/07/08-rax-minutes.html
People with action items: felix quention timea