Presentation on theme: "27-28 Sep 2007 CambridgeIVOA VOQL Group – Pedro Osuna IVOA VOQL Closing Plenary Session Cambridge Interop meeting Sep 2007."— Presentation transcript:
27-28 Sep 2007 CambridgeIVOA VOQL Group – Pedro Osuna IVOA VOQL Closing Plenary Session Cambridge Interop meeting Sep 2007
Interop 27-28 Sep 2007 CambridgeIVOA VOQL WG – Pedro Osuna Review of ADQL doc Overview of whats there in, what not and why Next immediate plans REGION definition REGION is needed REGION is a type CIRCLE, RECTANGLE (but see below), POLYGON defined Coordinate systems: allow string CONTAINS, INTERSECTS defined Summary of Session
Interop 27-28 Sep 2007 CambridgeIVOA VOQL WG – Pedro Osuna Summary of Session (II) REGION implementation Implemented in SQL Server 2005, using UDFs, base on the Spherical library (C# + SQL) built for SDSS and the NVO Footprint Service Language interface similar to existing GIS services BNF construction Incredibly involved to check for consistency in the BNF JAVACC used, unit tests created to preserve structure when making changes Will make it converge with REGION definition -- using User Defined Functions
Interop 27-28 Sep 2007 CambridgeIVOA VOQL WG – Pedro Osuna Issues touched Agreements on escaping of Utypes/UFIs needed Should we put POINT in? UNION, INTERSECTION, DIFFERENCE, BUFFER needed? Maybe for next version RECTANGLE not the right definition, or not the right word… Agreed to use DEGREES in all REGIONs. But RADIANS are default for Trig functions (make that explicit in the doc) Change BOOLEAN to BIT, as it does not exist in SQL92 Might want to rename some STC related types/functions to start with STC_. Alex and Arnold will recommend Look for GIS compatibility: Contains-> Contain, Intersects -> Overlap, ToString -> AsText Distance -> SphericalDistance
Interop 27-28 Sep 2007 CambridgeIVOA VOQL WG – Pedro Osuna Roadmap (from Beijing closing Plenary) Build-up of the ADQL draft. Stable document including region for Sep 07 DONE First TAP draft in Sep 07 ONGOING (transferred to DAL) Maybe some work on a Service (Crossmatch) to be presented in London (is it Cambridge?) NOT THERE YET (different group?)
Interop 27-28 Sep 2007 CambridgeIVOA VOQL WG – Pedro Osuna Roadmap (Current) No major issues found; nearly ready Inputs to the list expected next couple of weeks Finalizing agreements and wrapping up document by the end of Oct 2007 Beginning of standardisation process to be initiated in Nov 2007 Definitive doc for approval ready before the end of the year
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