ADQL/_SkyNode for theo"> Use case: ADQL/SkyNode for theory

Description

Astrophysicists doing simulations wish to publish their results in a VO compatible manner, in this case they wish to make their database of simulation catalogues available for querying via the VO query language, publishing it as a SkyNode. What is required is a specification that includes such datasets and a query language that allows the specifics of theoetical datasets. The datasets will include mock catalogues of observational objects such as galaxies, stars, but also of "unibservable" objects such as clusters extracted from N-body simulations.

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Principal actor

Theoretical physicist wishing to publish results of simulations producing mock catalogues.

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End Result

A SkyNode for theory datasets and a VO query language that supports peculiarities of theory datasets.

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Other actors

• VOQL working group
• database "wrapper"

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Pre-conditions

• Standards available to describe the tables/columns containing theory data (to be decided what is required in detail).

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Flow of events

• Simulaiton is run, mock catalogues are calculated
• Mock catalogues are stored in relational database
• A web service is written that exposes this database as an IVOA compatible skynode and supports querying by VO query language
• Service is registered in IVOA compatible registry

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Post-condition

• One can query registries to discover services wrapping theory databases
• One can query these services for metadata according to VO standard protocol
• One can query the database with VO standard query language

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Basic assumptions

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Alternative flows

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Key references

Examples of existing theory query services

• GalICS
• GAVO

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Requirements on IVOA working goups

• VOQL: ADQL/SkyNode specifications must support databases containing simulation data, foreign keys
• Registry must support metadata distinguishing theory sky nodes from observational ones
• UCD must support theory phenomenology:
• Apps?: would be nice to have an application that allows me to assign UCD/Units inforation to result of free-form SQL query where possible.

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Originally sent by G. Lemson - 2 Oct 2005
Last modified:

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Please add comments below. This area should be used for refinement of the above document. If you want to ask questions or start a dialogue with the author, please use the theory mailing list.

Need to check that appropriate UCDs are available to describe the columns. -- GuyRixon - 04 Oct 2005

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