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Re: [Admin] Agenda for RIF telecon 19 June

From: Dave Reynolds <der@hplb.hpl.hp.com>
Date: Tue, 19 Jun 2007 12:23:04 +0100
Message-ID: <4677BC98.2030705@hplb.hpl.hp.com>
To: Christian de Sainte Marie <csma@ilog.fr>
CC: RIF WG <public-rif-wg@w3.org>

Christian de Sainte Marie wrote:

> - Buildins
> 
>   PROPOSED: the buildins in RIF Core are exactly the ones listed in [6]

I think there's a couple of other groups needed, unless they are covered 
elsewhere.

** Constructors

I think we need the ability to convert between typed values and strings.
A general way to do that would be to support the constructor functions 
as defined in [1] for our selected datatype set. Specifically the 
constructor functions:

     xs:string
     xs:long
     xs:decimal
     xs:time
     xs:dateType

** RDF manipulation

We intend to include a means for representing RDF data in Core based on 
the frame syntax and some additional datatypes. We will need a 
corresponding set of builtin functions.

I suggest a minimum would be to support the SPARQL [2] functions:
    isIRI
    isBlank
    isLiteral
    lang
    datatype
    langMatches
    str

Plus we would need constructors for our mapped version of the RDF 
datatypes - iri, blankNode, plain-literal-with-lang-tag.
We need to complete the RDF embedding proposal before we can properly 
define this latter group.

** Output

Gary has suggested [3] that a minimal feature to enable test cases to be 
written in RIF would be the ability to output a data value (the output 
then being used to indicated success of the test case). Thus we would need:

     rif:print

** Lists

There will need to be builtins associated with the List datatype once 
that is settled.

Dave

[1] http://www.w3.org/TR/xpath-functions/#constructor-functions
[2] http://www.w3.org/TR/rdf-sparql-query/#SparqlOps
[3] http://www.w3.org/2005/rules/wg/wiki/Arch/Test_Cases

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Received on Tuesday, 19 June 2007 11:23:21 GMT

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