1. Victoria, May 18 2006Session III Theory Interest Group Session III Victoria, May 18 2006

2. Session III Agenda Review results this week Metadata models Road map

3. Victoria, May 18 2006Session III Monday TSAP: –Can be subsumed in SSAP if: POS not required, if provided, return null result (same with SIZE, TIME) FORMAT=METADATA (or request=getCapabilities) must remain –Registration possible once registry accepts SSA as standard service type and using type=SIMULATION to indicate theory data

4. Victoria, May 18 2006Session III Tuesday: UCDs Discussion Tuesday afternoon Compile list of words, no classification yet into UCD vs Standard Word Some structure though, that might lead to such a classification Working TWiki document on IVOA/TheorySemanticVocabulary Plan: work this out further to come to proposal –Who ? –Not to comprehensive, targeted to ??? (discuss here) –Cross-check with existing list (Semantics/VOEvent?) –Propose to Semantics WG –When ? –Longer term: use in data model for describing simulations (see there)

5. Victoria, May 18 2006Session III Wednesday: Data formats and SNAP Focus on intermediate and large scale simulations: particles and mesh in 3D space. Issue: many proprietary formats Services need to produce datasets users can understand –Straightforward choice: VOTable, possibly using BINARY data, possibly base64 encoded. –Alternative proposal: allow original file but force publisher to provide wrapper codelets to read the files and produce … what ? –Chose to first try out VOTable. Plan: –Sell VOTable+binary+base64 to theory community –Write prototype/template translators for some complex existing data types. –Tools/libraries capable of reading these into SNAP –Subject: particle and mesh data. Former produces tabular data, latter ? FITS ok for regular meshes, but ARM ? Input to DAL efforts on cubes/complex/generic datasets ? –Functions: Retrieve whole Retrieve part: Question, how to decide which part ? Proposal: need functions creating small, summarising, meaningful info about the dataset. Examples: thumbnail, random sample, projection, gridding (for particles). (see CGs presentation) –Query: see today –Protocol: not discussed here, but initial draft exists.

6. Victoria, May 18 2006Session III Thursday: metadata SNAP as prototype: –Need protocol for discovery of interesting simulations (not just in SNAP) –Proposal: base on metadata model (i.e. SSA like, not SIA like) –Focus on this type of simulation, but identify areas which all simulations share. Discussion now and possibly later: –Characterisation (of what ? Results vs capabilities), –Physics and subject (use semantics effort) –Computational aspects

7. Victoria, May 18 2006Session III Road map Finish use cases note Standard vocabulary/UCDs for theory SNAP –Data models –Protocol Generic service registration using standard vocab (outreach) Other protocols desired ? Generic simulation model ?? Service use in GWS-manner