[Pharo-project] Resource Descriptor Framework

Serge Stinckwich serge.stinckwich at gmail.com
Wed Feb 8 04:02:23 CET 2012


Hi Ben,

On Wed, Feb 8, 2012 at 12:52 AM, Ben Coman <btc at openinworld.com> wrote:
>
> Is there much being done with Resource Description Framework in
> Squeak/Pharo?   I have some RDF data files that I need to load for my
> masters project and am seeking advice on how to approach this.  I am only
> just learning about RDF for the first time.   For anyone else interested the
> best short overview I found so far is  [
> http://logicerror.com/semanticWeb-webdev ]
>
> Apparently it this is a Simplified RDF Syntax as described at  [
> http://www.langdale.com.au/CIMXML/PSModelExchange.pdf ]
>
> A data file looks like like this...
>
> <?xml version="1.0" encoding="UTF-8"?>
> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>               xmlns:cim="http://iec.ch/TC57/2007/CIM-schema-cim12#">
>   <cim:ACLineSegment rdf:ID="_7814201">
>       <cim:Conductor.length>95</cim:Conductor.length>
>       <cim:IdentifiedObject.name>AMHE400MARCLINE</cim:IdentifiedObject.name>
>       <cim:ConductingEquipment.BaseVoltage rdf:resource="#_400000302"/>
>       <cim:Equipment.MemberOf_EquipmentContainer
> rdf:resource="#_487038201"/>
>   </cim:ACLineSegment>
>
> The most obvious project on Squeaksource is Rakaiko [a] which says "RDF is
> an essential part of the new web technologies and a fundamental layer of the
> semantic Web 2.0 [...]  This API, compliant with the W3C RDF specification
> will allow a developer to handle an RDF graph in its various forms (RDF/XML,
> N3, abstract graph). In other words, it would be the Squeak equivalent of
> the Jena Java RDF API."    However there has been no activity on Rakaiko
> since 2007 and there is no apparent documentation.   Has anyone used this
> and/or is this abandoned?
> Page 20 of "ESUG 2006 Welcome" mentions a "RDF Framework for Smalltalk."
>  Did anything come of this?

This framework was done by one of my former student, Julien Bourdon
who is currently finishing his PhD thesis
in Kyoto. I put him in CC, but not sure that he has time at the moment
to help you.

> Alternatively I could fake it and learn just how to parse the XML directly
> and manually translate it into the class model.   (It seems processing an a
> RDF Schema might be able to automatically create the class definition as
> well as the instance creation )
>
> There is PetitXML, which however is not included by
> ConfigurationOfPetitParser.24 loaded on Moose 4.6.  What is the status of
> PetitXML ?
>
> Also Moose 4.6 has XML-Parser.   Which of XML-Parser or PetitXML would be
> the better approach ?
>
> I've watched http://www.tudorgirba.com/blog/simple-xml-browser-with-glamour
> but not sure whether than will help me actually load the data into a model.
>
>
> You opinion of these various approaches would be appreciated, and of course
> pointers to any examples/documentation.
>


Regards,
-- 
Serge Stinckwich
UMI UMMISCO 209 (IRD/UPMC), Hanoi, Vietnam
Matsuno Laboratory, Kyoto University, Japan (until 12/2011)
http://www.mechatronics.me.kyoto-u.ac.jp/
Every DSL ends up being Smalltalk
http://doesnotunderstand.org/



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