This specification will define the minimal data about each resource in registry which must be maintained and queryable.

Should resource metadata be described using RDF? Just the name, Resource Description Framework, seems to fit the bill. Would make it easier to transition any metadata into an ontology described using OWL.

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Comments

Anyone wanting to look into RDF can look at the RDF Primer, which is now in a new version (Working Draft 23 January 2003) -- TonyLinde - 28 Jan 2003

Another link to check out for RDF is Dave Beckett's Resource Description Framework (RDF) Resource Guide: it is huge -- TonyLinde - 28 Jan 2003

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Metadata prototyping efforts

• Resource Metadata (folks working parallel efforts in this area are encourages to add pointers below.)
  • VOResource
    • based on RM document by Hanisch et al.
    • Current version: VOResource.xsd
    • an example instantiation: adil.xml
    • Comments and illuminating figures

• Space-Time Metadata
  • Arnold's Space-Time Coordinates page describes the current model and includes a link to a DTD.
  • The current version of the regions schema can be seen as a DTD.

• AstroGrid Registry
  • First cut description of AstroGrid Registry Structure

Metadata Specifications

Metadata specification efforts are under development within the RWG work package 3. It has two components:

• core resource metadata concepts, independent of any encoding scheme. See /twiki/bin/view/Main/WebHomeDocuments for the latest recommendation currently going through the IVOA Standardization process.

• XML Schemas: see IVOARegWp03#Specifications for latest versions

-- RayPlante - 15 Oct 2003