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DC8 Registries Breakout

DC8 Registries Breakout. Goals of the session. Discuss and clarify : Requirements for registry Framework for policy Relate issues raised to EOR prototype (Re-)charter registry WG. Agenda. Purpose of registry Scope of registry Policy and process Tom’s strawman proposal Versioning

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DC8 Registries Breakout

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  1. DC8 Registries Breakout

  2. Goals of the session Discuss and clarify : • Requirements for registry • Framework for policy • Relate issues raised to EOR prototype • (Re-)charter registry WG

  3. Agenda • Purpose of registry • Scope of registry • Policy and process • Tom’s strawman proposal • Versioning • Relate issues to technical solution • WG charter

  4. Purposes are to Define Align Map Promote Inform Control change Who are the users? Humans Software tools What are metadata registries for…..?

  5. Schema Registries Registry Registry Registry • Registry provides access to collection of schemas • global? national? sectoral? • standard schemas and application profiles? • how do we discover registries? • are registries database or portal? thick or thin?

  6. Thick registry RDF schema Syntax spec App profile Mapping profile Thick Registry Scheme info Usage guide schema database Software tools Users

  7. Thin registry RDF schema Syntax spec App profile Mapping profile Scheme info Usage guide Thin Registry schema portal Users Software tools

  8. Prototype registries • Meta-Form http://www2.sub.uni-goettingen.de • DESIRE metadata registry http://desire.ukoln.ac.uk/registry/ • DC Registry http://www.mailbase.ac.uk/lists/dc-registry • SCHEMAS registry http://www.schemas-forum.org/

  9. User requirements • Query status of qualifiers • Mappings • Who is using what • Machine-readability • Ability to submit (publish) a schema • DC-friendly schemas in XML.ORG

  10. Continued… • Granularity of registries: at a detailed element-level, not just schema-level (DTD) • Access to additional information related to elements – crosswalks, endorsements • DCMI as gateway for • Editorial review • For every published schema, fifty more out there somewhere

  11. Continued… • Look for schemas (elements) by domain • Specifying authority • Effect of translation or implementation on standards • Collecting information on usage • Archiving elements no longer in use or declared obsolete

  12. Continued… • The DCMI Schema that describes elements and qualifiers in sufficient detail • What working group is discussing this • Compatibility with ISO 11179 • Extensions to RDF Schema in medium term

  13. Scope of DCMI registry • Stages of implementation (phase) • Feedback loop in usability is necessary • Interface issues • Access to crosswalks • Annotations about crosswalks • Version control, providing authoritative

  14. Scope • Pin down requirements (formal statement to circulate to XML Schema, RDF Schema, XML DTD experts) • Identify milestones for phased implementation • One-place reference for search query formulation • Pointers to related services • Difference between user guide and registry(no duplication) • Specify which sorts of schemas we include and prioiritise (e.g.DC namespaces, application profiles)

  15. Policy and process • Strawman: role for usage committee in annotation, role of working groups….. • Status of elements depends on agreed criteria • Usage committee role limited to valid grammar coniderations • WG recommend qualifiers • Clarify roles of committees (Registry, Usage, Advisory)

  16. Usage: does it conform • Working groups propose • AC: the particular status • EC: final stamp of approval

  17. Two registries • Registry local schemas • Self-publishing versus peer-reviewed publishing • Top-down authorized or bottom-up posted • Annotation technology depends on policy

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