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Theory Interest Group

Theory Interest Group

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Theory Interest Group

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  1. Theory Interest Group Closing plenary Victoria, May 19 2006 Closing plenary

  2. Sessions I + II • Registry for theorists (Ray Plante) • Characterisation for theorists (Mireille Louys) • UCDs for theorists: computation namespace (Laurie Shaw) • SSAP for theorists: TSAP (Pedro Osuna) • DAL for theorists: Implementation of a SNAP-like service for the TVO (Claudio Gheller) Closing plenary

  3. Main conclusion • Registration onf non-standard services possible already now • Characterisation promising approach applicable to theory data. • Synthetic spectra 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 Closing plenary

  4. Breakout session Tuesday: UCDs • Discussion Tuesday afternoon with APM • Compile list of words, no classification yet into UCD vs Standard Word • Some structure, that might lead to such a classification • Working TWiki document on IVOA/TheorySemanticVocabulary • Plan: work this out further to come to proposal • List on TWiki open for two weeks after announcement email • Cross-check with existing list (Semantics/VOEvent/…) • Propose to Semantics WG • Longer term: use in data model for describing simulations (see there) Closing plenary

  5. Breakout session 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 ? • Plans: • Sell VOTable+binary+base64 to theory community • Write prototype/template translators for some complex existing data types. • Go ahead with SNAP (DAL approved) Closing plenary

  6. What is SNAP ? • Subject: • N-body • (adaptive) mesh • “evolving objects in 3D space” • 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: based on metadata model • Protocol: not discussed here, but initial draft exists. ADQL ? Closing plenary

  7. Session III (Thursday) • Summary of work to date • Results: • Task group for Semantics UCD and Standard Vocab list • Task group for SNAP functionality protocol • Market proposals to theorists (task group + project contact persons) and get services registered • Volunteers to prototype UWS oslt for theory services Closing plenary

  8. Breakout session Friday:Modeling metadata • Focus: describe SNAP-like simulations • N-body • (adaptive) mesh • “evolving objects in 3D space” • Subjects: • Physics, phenomenology (semantics) • Design and provenance • Characterisation • Use • SNAP service • Registration • Plan: • First get data dictionary (i.e. the standard vocab in semantics) • Conceptual, analysis model • Logical model • Serialisation/binding (XML, Java etc, Relational model (for ADQL)) Closing plenary

  9. Road map • Finish use cases note (on TWiki, June 2006) • TSAP ready to go ahead, dependency on SSA (standard) and on Registry (SSA type) • Generic service registration using standard vocab (outreach) • All the time • GL will contact project contact persons about this (next week) • Standard vocabulary/UCDs proposal for theory (End June 2006) • TWiki list open for two more weeks (half June 2006) • Work over with small group in following month and submit to Semantics (July 2006) • Data formats • Poll of theorists into their data formats and willingness to publish their data in specified manner (Dave Zuerk et al, Dave DeYoung, report by Moscow hopefully) • Volunteers will try translating some typical formats into VOTable+base64 binary data, report in Moscow. • SNAP (go ahead by DT) • Data model (pending approval?), discussion in Moscow • Protocol, discussion in Moscow • 0.5 (May 2007) • Other protocols, wait for stated desire • Service use in GWS-manner • Depends on GWS • Volunteers are there to wrap their existing services in any specified manner • Theory/Observational interface • Virtual telescope spec+prototype May 2008 Closing plenary