[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]
Subject: RE: [xdi] Resource and Data
Both Loren and Bill have brought up the potential need for a container element for subresources (Resources contained by a parent Resource in the v5 metaschema). Both of them have good arguments for it, and I've shared with them at least one good argument against it. The net net is that it's a wonderful, meaty topic that we'll be diving into on today's call. =Drummond -----Original Message----- From: Loren West [mailto:loren.west@epok.net] Sent: Wednesday, August 18, 2004 2:46 PM To: xdi@lists.oasis-open.org Subject: RE: [xdi] Resource and Data Funny. I read Gabe's request to mean the difference between <data> and it's sibling <resource> elements. Drummond read the request as the difference between <data> and it's parent <resource>. Now I'm more convinced than ever that we need a different name for the <resource> elements that are siblings to <data> (or at least group them under a <meta> tag). They often times get confused with the parent <resource> element. =Loren -----Original Message----- From: Drummond Reed [mailto:drummond.reed@cordance.net] Sent: Wednesday, August 18, 2004 2:34 PM To: 'Wachob, Gabe'; xdi@lists.oasis-open.org Subject: [xdi] Resource and Data Gabe, it's a fine question. We've been working with the Resource/XRI/Data element names for long enough now that no one has bothered to ask this basic question. I will give a very precise definition according to RFC2396bis and XRI 1.0. An XDI "resource" is an entity that can be represented in an XDI document and identified by an XRI. Period. It's abstract in the extreme. XDI "data", by contrast, is any information that can be represented in an XDI document that IS NOT identifiable by itself, but must be placed in the context of one or more XRIs in order to become identifiable. Example: <data>43</data> The value "43" in this XML element is XPath-addressable (in the scope of a specific XML document) but not XRI-addressable. <resource><xri>=Mary.Jones/(+age)</xri><data>43</data></resource> Now this data has become identifiable - in both a local and global context - with an XRI and thus now meets the RFC2396bis and XRI 1.0 definition of a resource. Of course, data does not have to be just a literal value. Complex data can be a collection of resources. However, a collection of resources (each of which itself is identifiable) needs to be put in the context of one or more XRIs to be identifiable as a *collection*, so it still meets the definition of data. The next step beyond this simplest definition is to compare the XDI tuple with the RDF tuple, and talk about Resource as Subject, XRI as Predicate, and Data as Object. That was addressed in the powerpoint uploaded for the last TC call (http://www.oasis-open.org/committees/download.php/8454/How-XDI-Builds-On-RD F-v1.ppt). With your knowledge of RDF, I would love your feedback on that view of Resource and Data. =Drummond -----Original Message----- From: Wachob, Gabe [mailto:gwachob@visa.com] Sent: Wednesday, August 18, 2004 11:27 AM To: drummond.reed@cordance.net; xdi@lists.oasis-open.org Subject: RE: [xdi] Groups - draft-xdi-metaschema-v5.xsd uploaded Drummond- Can you explain in a sentence or two what the meaning of resource vs. data is? This doesn't seem to be documented anywhere - you may have discussed this on the phone calls, but I don't see explanation in the minutes (not that I'd expect such content to be in minutes). Thanks -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: drummond.reed@cordance.net [mailto:drummond.reed@cordance.net] > Sent: Tuesday, August 17, 2004 11:39 PM > To: xdi@lists.oasis-open.org > Subject: [xdi] Groups - draft-xdi-metaschema-v5.xsd uploaded > > > The document draft-xdi-metaschema-v5.xsd has been submitted > by Drummond Reed (drummond.reed@cordance.net) to the OASIS > XRI Data Interchange (XDI) TC document repository. > > Document Description: > v5 Proposed XDI Metaschema (only change is Comment element eliminated) > > Download Document: > http://www.oasis-open.org/apps/org/workgroup/xdi/download.php/ > 8761/draft-xdi-metaschema-v5.xsd > > View Document Details: > http://www.oasis-open.org/apps/org/workgroup/xdi/document.php? > document_id=8761 > > > 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. > > >
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]