Fitting HEASARC tables into the UCD framework.

During the past few weeks, we have been trying to see how well the HEASARC's tables fit into the UCD framework as currently defined. We've also looked at how well the current Web tools provided by the CDS do in determining the UCD automatically from our existing metadata. A report summarizing our experiences is attached.

The three line summary is that the basic framework seemed to be work well, but that there seemed to be some holes in the coverage of concepts related to the process of proposing, taking, analyzing and archiving observations.

We'd be very interesting in comments on this. Assuming we don't learn that we've overlooked a whole slew of UCDs, we'll be going ahead and proposing some new words. (And if we have missed a bunch then we'll be trying to see how we might improve the documentation!). Eventually we anticipate providing full UCDs for all 400 HEASARC tables including the ~200 or so that are not duplicated in Vizier.

	Regards,
	Tom McGlynn and Michael Preciado





application/msword attachment: UCD_summary.doc