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 –Toms strawman proposal –Versioning Relate issues to technical solution WG charter

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

5. Schema Registries 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 Thick Registry RDF schema Syntax spec App profile Scheme info Mapping profile Usage guide Software toolsUsers schema database

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

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