Archives for: January 2008

Wednesday, January 16th 2008

Permalink 09:58:58 am, Categories: Meeting summaries

Meeting summary 14 January 2008

We talked briefly about the work that Jeremy Carroll has been doing (and continues to do). It looks very promising and should solve a lot of the problems we have been facing. There was some concern about the limited expressivity of the POWDER Lite document and whether this really means that any complicated Resource set (URI set) must be defined using regular expressions but this doesn't seem to be the case. Also, is the power of OWL being lost? Not really since any DR can be GRDDL'd into an OWL instance. After a bit of housekeeping regarding registrations for the forthcoming face to face in Athens and the outreach event in London in March, we wrapped up early.
Phil ARCHER

Tuesday, January 8th 2008

Permalink 03:49:04 pm, Categories: Meeting summaries

Meeting Summary 7 January 2008

The Bristol meeting held just before Christmas means that the group has had a good deal of (very welcome) input from outside its membership. The group digested the advice received so far and actions have been assigned that should bring the Grouping of Resources document and the accompanying vocabulary and schema documents up to date. It seems that the changes necessary for these documents are relatively few in number so we're hopeful of making progress towards last call with these in the near future. In discussing the comments raised by Jeremy Carroll concerning groups of URIs rather then groups of resources, it was resolved that "The WG is happy to forego grouping by resource property if that means that POWDER avoids a lot of complexity for little obvious gain." We'll expand on this in the change log of the grouping doc but the basic point Jeremy makes is taken. The meeting ended with brief discussions about the logistics for the forthcoming face to face meeting in Athens (31 Jan - 1 Feb) and an outreach event being planned with the GSM Association for March.
Phil ARCHER
Permalink 03:47:00 pm, Categories: Meeting summaries

Meeting Summary 17 December 2007

The meeting began with a discussion of the new Open Archives Initiative's Object Reuse Exchange specification. Like POWDER, this seeks to create aggregations of resources. However, the similarity is not as great as it seems at first: resources are included in the aggregation through explicit enumeration; and ORE does not provide a way to apply metadata to members of the aggregation. It allows you to create an aggregation and declare who you are, when (and presumably why) you made the aggregation etc. but it doesn't allow you to say 'all the resources in the set are blue.' The POWDER WG will send a formal response to the OAI in the near future. The group discussed recent and very welcome input from members of the Semantic Web community and the imminent meeting with Jeremy Carroll, Dan Brickley and Stuart Williams. The expert opinion has swung from the model published originally to one based on OWL and reification and in recent posts by Jeremy back to the original. The WG is generally of the opinion that what matters is meeting the use cases and that is more important than developing the Semantic Web. We need to be able to freeze the basic data structure as soon as practical and move on. Work has begun on the Primer which will seek to answer 5 questions:
  1. What is it (and why is it better than what I have already)?
  2. What can I do with it (as a producer or consumer of POWDER)?
  3. What do I need for it?
  4. How do I use it?
  5. Is there something I need to worry about?
The group agreed that these were the questions it felt should be answered! Finally, the group briefly discussed plans for an event similar to that held in July. This will be held in London, probably on 18th march 2008 with a strong mobile-element. And with that, the group's work for 2007 was over. Next meeting 7 January.
Phil ARCHER