International Virtual Observatory Alliance

Difference: IVOATheorySimDBDM (14 vs. 15)

Revision 152009-10-05 - GerardLemson

META TOPICPARENT	name="IvoaTheory"

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This page is devoted to describing the SimDB data model (SimDB/DM from now on).

Current model

As described here all development can be followed on Volute. Particularly relevant for the discussion on this page is the data model in uml/SimDB_DM.xml.

Changed:

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The previous versions as well as later working versions can be found in the history of this file, as well as its direct predecessor version r902.

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The previous versions as well as later working versions can be found in the history of this file, as well as its direct predecessor version r902.

An image of the latest version of the model is reproduced at the bottom of this page.

To be discussed

OK on approach?
- modelling: analysis(conceptual)->logical->physical
- TAP+XML+UTYPE serialisations derived from logical model
Identify main issues of model
- sufficiently detailed resources?
- characterisation, provenance etc (see separate page)
- normalisation (problem for XML, little for TAP)
- "queriability" (problem for TAP)
- missing semantic vocabularies
- quantities/units
Clean up
- documentation in the UML
- Description of model in Note
finalise the serialisation to UTYPEs
finalise the serialisation to TAP (see IVOA.IVOATheorySimDBTAP)
finalise the serialisation to XML schema ((see IVOA.IVOATheorySimDBREST)
reuse by other specs
- SimDAP
- S3
...

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