Difference: ObsDMCoreComponents (36 vs. 37)
Revision 372010-09-07 - MireilleLouys
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| < < | +Description of a Simple SET of Core components for the Observation Data Model ( CoreObs or ObsCore) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| > > | +Description of Core components for the Observation Data Model ( CoreObs or ObsCore) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ++Goal This model is meant to gather all queriable metadata that play a role in the discovery of observation data. It is meant to be implemented using the Utypes derived from this model in a TAP/Schema implementation at various archives sites. This exercise focuses on the capability to serve 80% of the data , with reduced / reasonable implementation costs at the archive side. ++ Uses cases A list of Use- cases for data queries on all possible data types has been collected by David Schade , CVO and collaborators on behalf of the IVOA Uptake committee. see the document here. ++ UML Prototype Model v0.1 This is the first version of the UML diagram describing the main components for this Observation DM. The compressed archive file contains a bunch of webpages that describes the various packages and classes of the model. see the archive compressed file in 7zip here , in zip there . These are hyperlinked pages: to start with the top level , launch the index.html file and you will navigate in the various elements of the model. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| > > | v1.1 / sept 2010 to be uploaded soon | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ++ UTypes From the UML classes and attributes names, one can derive Utypes strings as described in the current UTYPES draft ( Utypes WD). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| < < | Utypes are built up accordingly for ObsDMCoreComponents and can be used for the first use-cases described in the Use-Case document here. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| > > | Utypes are built up accordingly for ObsDMCoreComponents and can be used as unique labels for each piece of information represented in the the data model. These Utype strings can be used in the TAP implementation of the model. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| > > | For each query mentionned in the Use-Case document here there is an item in the model covering the corresponding concepts. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| < < | A set of Utypes has been identified by the Obs/TAP focus group as 'mandatory' for any service that supports an OBS/TAP discovery protocol. They are avaiblable in Table 1. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| > > | A set of Utypes has been identified by the Obs/TAP focus group as 'mandatory' for any service that supports an Obs/TAP discovery protocol. They are avaiblable in Table 1. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Column-names will be mapped to these Utypes and used in ADQL queries. Other Utypes supported in the model and useful to identify the piece of metadata in the response of an Obs/Tap service have been listed in Table 2. + v0.2: Just one list of elements for the data model with corrected Utypes, Mandatory fields are shown in green. see the full table here | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| < < | ++ Xml serialisation The Obs_4.xml xml document is a first example of an Observation metadata document based on the Observation xml schema, an attempt of serializing the Observation data model in XML. Validation of this example with Oxygen which you can visualize here requires upload of the new version of the new characterization schema which will be documented on the characterization page. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| > > | ++ XML serialisation The ObsCore Model may also be implemented using XML serialisation. Here are some preliminary examples of XML documents and a first version of the XML Schema. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| > > | Click here to see the validation of this example with Oxygen. This requires upload of the updated version of the new characterization schema which will be documented on the characterization page. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ++ Registering ObsTAP services Since ObsCore is just another table in an otherwise normal TAP service, the current notion is that support for ObsCore will be advertised via a flag in the TAP Capability extension. This is being discussed at TAPRegExt. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| < < | ++ ObsTap Discussion / Post Interop Friday 13 ESO/ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| > > | ++ ObsTap Discussion | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| < < | ! this still work in progress ! Thanks for your comments and feedback . Mireille | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| > > | Details on the model and its implementtaion have been discussed in various meetings and summarised in the notes attached below. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| > > | Summary in the ObsTap page. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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