IVOA, Kyoto May 16-20 20051 Data Access Layer Working Group Status and Plans for this Workshop Doug Tody National Radio Astronomy Observatory International.

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IVOA, Kyoto May Data Access Layer Working Group Status and Plans for this Workshop Doug Tody National Radio Astronomy Observatory International V IRTUAL O BSERVATORY

IVOA, Kyoto May DAL Status Data Access Protocols –SSA Have working draft (V0.85) protocol and data model specifications Achieve stable SSA V0.9 following Kyoto discussions –SIA SSA V1.1 will be based on SSA interface and metadata Uses new data models (Identify, Curation, Characterization, etc.) Integrate new metadata extension mechanism into SIA, SSA Transition –Shift focus from protocols to reference code, frameworks –Integrate GWS technology: asynchronous services, VOStore, SSO –Develop concept and roadmap for ADQL integration with DAL –Data Analysis and VO: service framework, VO-client API

IVOA, Kyoto May Topics for this meeting SSA –Review draft specification for query interface –Resolve integration issues with SSA/SED data models –Finalize working draft V0.90 interface after meeting –Related: new work package created for spectral line lists SIA –V1.1 Most of the query interface will be common with SSA Largely a metadata upgrade; basic functionality similar Integrate metadata extension mechanism –What to do about GWS support? –Asynchronous services, staging, VOStore, SSO, etc. –Start looking at 3D data

IVOA, Kyoto May Topics for this Meeting ADQL DAL Integration –Functional prototype already working (Yuji) –Basically provides an alternative way to do DAL queries –Query response, data access remain the same –Further work needed to define integration with/into DAL Data Analysis and VO –How to integrate VO into community data analysis software –DAL: shift focus from protocols to reference code, frameworks Service framework, VO-client API Addresses server and client side of VO data access services –"VO-Client" to interface to client data analysis software –How to wrap data analysis code to make VO services