Difference: ObsDMCoreComponents (45 vs. 46)

++News /draft /reports

First official draft version was WD-ObsCore-v1.0-20101207.pdf and can be found here. The corresponding original Tex file is attached below and currently updated following inputs during the Nara meeting.

++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 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.

ObsCoreDM v1.0 / Feb 2011 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). 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.

For most of the query mentionned in the Use-Case document here there is an item in the model covering the corresponding concept with a Utype string representing this data model element.

+ v0.11: 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.

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.