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Subject: XDI as RDF
Gabe,
I was on vacation when you sent this message out; I'm just getting caught up
on mail. Just wanted to say this is really super stuff - it fulfills the
expectation we have discussed for some time that XDI and RDF should both be
able to describe the other (similar to the Cartesian and radian coordinates
analogy).
Did you see Dave McAlpin's example document showing XML in XDI format? He
illustrates the case of enveloped XDI inside existing XML documents much the
way you suggest it could be wrapped in RDF.
=Drummond
-----Original Message-----
From: Wachob, Gabe [mailto:gwachob@visa.com]
Sent: Wednesday, June 30, 2004 9:53 AM
To: Wachob, Gabe; drummond.reed@cordance.net; xdi@lists.oasis-open.org
Subject: RE: [xdi] Groups - draft-xdi-metaschema-v3.xsd uploaded
And just since I'm on a role, you could express the same content of the XDI
"metaschema" as an set of RDF statements (I'm using n3 - a shorthand
notation for RDF - much like RelaxNG has a compact syntax). First, you'd
define a set of new Properties and a new Class of resource called
XDIResource:
----
# I've left out namespace declarations here
xdi:root a rdf:Property.
xdi:link a rdf:Property.
xdi:xri a rdf:Property.
xdi:data a rdf:Property.
xdi:resource a rdf:Property.
xdi:XDIResource a rdfs:Class; rdfs:subClassOf rdfs:Resource.
xdi:root rdfs:domain xdi:XDIResource;
rdfs:range xsd:boolean.
xdi:link rdfs:domain xdi:XDIResource;
rdfs:range xsd:boolean.
xdi:xri rdfs:domain xdi:XDIResource;
rdfs:range xsd:string.
xdi:data rdfs:domain xdi:XDIResource;
rdfs:range rdf:XMLLiteral.
xdi:resource rdfs:domain xdi:XDIResource;
rdfs:range xdi:XDIResource.
---
Then, you can make statements about an XDIResource (equivalent to an XDI
Descriptor) anywhere you'd like (in another RDF document, in a RDDL document
-- anywhere you can put in RDF statements):
# Namespace declarations omitted
<xri:@example*xdi*resource> a xdi:XDIResource;
xdi:root "true";
xdi:link "false";
xdi:xri "xri:@some*other/one";
xdi:data "<foo/>";
xdi:resource <xri:@example2*xdi*resource>
----
You might want to insert these RDF statements (in RDF/XML) into XHTML pages
(a la RDDL - http://www.rddl.org) or into the RDF metadata in a PDF document
(via XMP - http://partners.adobe.com/asn/tech/pdf/xml.jsp) or you may want
to drop it into a reasoner (http://www.w3.org/2000/10/swap/doc/cwm or
http://www.agfa.com/w3c/euler/), or you may want to integrate it with FOAF
(http://www.foaf-project.org), or ... The point I'm making is that RDF makes
it REALLY easy to integrate with other semantic/data architectures and
applications...
Just food for thought.
-Gabe
__________________________________________________
gwachob@visa.com
Chief Systems Architect
Technology Strategies and Standards
Visa International
Phone: +1.650.432.3696 Fax: +1.650.554.6817
> -----Original Message-----
> From: Wachob, Gabe
> Sent: Tuesday, June 29, 2004 4:39 PM
> To: drummond.reed@cordance.net; xdi@lists.oasis-open.org
> Subject: RE: [xdi] Groups - draft-xdi-metaschema-v3.xsd uploaded
>
>
> Drummond-
> Here's the RelaxNG Compact Syntax schema for your v3 proposal...
>
> -Gabe
>
> ------------------------
>
> default namespace="http://xdi.oasis-open.org";
> start=Resource
>
> anyelement = (element * { (attribute * {text} | text |
> anyelement) * })
>
> RefContent= attribute root {xsd:boolean}?,
> attribute link {xsd:boolean}?,
> element note {xsd:string} *,
> element xri {xsd:string} +,
> element data { anyelement *} ?,
> Resource *,
> anyelement *
>
> Resource = element resource {RefContent}
>
> ------------------------
>
>
> __________________________________________________
> gwachob@visa.com
> Chief Systems Architect
> Technology Strategies and Standards
> Visa International
> Phone: +1.650.432.3696 Fax: +1.650.554.6817
>
>
> > -----Original Message-----
> > From: drummond.reed@cordance.net [mailto:drummond.reed@cordance.net]
> > Sent: Wednesday, June 23, 2004 4:35 PM
> > To: xdi@lists.oasis-open.org
> > Subject: [xdi] Groups - draft-xdi-metaschema-v3.xsd uploaded
> >
> >
> > The document draft-xdi-metaschema-v3.xsd has been submitted
> > by Drummond Reed (drummond.reed@cordance.net) to the OASIS
> > XRI Data Interchange (XDI) TC document repository.
> >
> > Document Description:
> > v3 of the proposed XDI metaschema - removes Link element and
> > replaces it with two boolean attributes on Resource element
> > ("root" and "link")
> >
> > Download Document:
> > http://www.oasis-open.org/apps/org/workgroup/xdi/download.php/
> > 7426/draft-xdi-metaschema-v3.xsd
> >
> > View Document Details:
> > http://www.oasis-open.org/apps/org/workgroup/xdi/document.php?
> > document_id=7426
> >
> >
> > PLEASE NOTE: If the above links do not work for you, your
> > email application
> > may be breaking the link into two pieces. You may be able to
> > copy and paste
> > the entire link address into the address field of your web browser.
> >
> >
>
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