Conclusions from theory IG sessions, Beijing 2007

3 sessions

• SNAP data model– overview– validation (Patrizia Manzato)

• SNAP protocol (for Claudio Gheller)– discovery– query– registration– services

• Presentations– Nicolas Moreau: Dalia, interface for simulation codes– Vincenzo Costa: theory metadata database as SNAP prototype– Franck Le Petit: theory services in AstroGrid– GL: theory database– no other business

To do: SNAP DM• Completion model. Issues:

– characterisation,– semantic vocabularies– units

• Usage– serialisation to XML schema (for validation, registration, XQuery based

discovery)– relational mapping (for ADQL based discovery)– serialisation to UTYPE list (for representation in VOTable, possible “simple”

discovery)• Validation

– produce XML docs describing variety of simulations • Patrizia Manzato, Jean-Paul Lefèvre, Tom Theuns/Joop Schaye, Peter Teuben,

Rick Wagner, Klaus Dolag, GL, more?• Propose to IVOA DM WG • prototype/proof-of-concept(/Reference?) implementations

To do: SNAP protocol • Discovery+query

– investigate simple (HTTP GET) approach further– investigate (i.e. prototype) SNAP portal/archive approach (Italy,

France?, US?, VOExplorere-like)– work with registry group on architecture (Ray Plante)

• SNAP services– Define some standard services+interface

• download• cutout• visualise• ...

– Allow and promote (registered) custom services– Follow DAL/GWS on capabilities, staging, delivery etc

• Propose to DAL as Note following standard doc format, but with place holders.

To do: contact the community

• Validate approach to theory data centers– contact theory representatives to do so locally

• Validate approach towards potential users, both theorists and observers– contact theory representatives to do so locally

Requests to WGs• DM: We need input on treatment of units and want to further

discuss characterisation• Semantics: We need input (or feedback) on standard

vocabularies for– physical processes– astronomical objects – observables (UCDs)– numerical artefacts

• DAL/GWS: We need to hear how to deal with SNAP services in a standard manner.

• Registry: We need to further develop the way SNAP archive/portal will interact with registry.

• Applications?: We’d like a browser for real data models, ala VOExplorer.

• Action on theory group: use mailing lists

Dates, roadmap

• SNAP DM Note to DM WG– September 2007 (month before interop)

• SNAP protocol Note to DAL WG– Needs discussion with Claudio Gheller (who leads this effort) et

al, in June.– Target September 2007 (month before interop)

• Proof of concept implementations: registration+discovery of simulations– Promised by Italy, France. Maybe also US, UK/Germany?– Will ask them “when” in June 2007

• Outreach, gathering feedback – Mail to TIG reps, June 2007– Results unpredictable, report by Cambridge interop

AOB

• Do we need a different name for SNAP?– not all numerical products covered– not simple– not Supernova/Acceleration Probe

http://snap.lbl.gov/– Please send proposals to theory mailing list.

• Q: Any other standardisation efforts desired, e.g. theory spectra? No.