InterOpMay2005 UCD (Content Description)

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Participants

A. Preite Martinez (APM), J. McDowell (JCM), A. Sarkissian (AS), S. Derriere (SD), A. Micol (AM), G. Lemson (GL), A. Lawrence, P. Osuna, ...

Timetable

Meeting starts Friday 20, 9:00 a.m.

09:00 - 10:30 Joint session with DM3 - Room I
11:00 - 12:30 Joint session with VOEvent - Room J

Time	Content	Leader
09:00	Introduction (.pdf)	A. Preite Martinez
09:10	Tools and Web Services (.pdf)	S.Derriere
09:30	UCDs for the SED data model (.pdf)	J.McDowell
09:50	UCDs for Planetology (.ppt)	A.Sarkissian
10:00	Actions	A. Preite Martinez
	Discussion	All
10:30	Coffee break
11:00	VOEvent vocabulary	A. Allan (.ppt)
	Discussion on VOEvent	All
12:15	Conclusions - wrap up

Materials and notes from the work group and plenary sessions

Joint session with DM group

Tools for UCD1+

There is a set of simple tools for UCD1+, also available as Web services for UCD1+

UCDs for the SED data model

JCM presented the list of new proposed UCDs since Pune (some already adopted):

• phys.energyDensity - useful for extragalactic, CMB
• stat.fill - Filling factor
• arith.log (rejected at Pune, handle with units)
• spect.radioVeloc and spect.optVeloc
• curation-type stuff
• src.net, src.total, src.background
• instr.beam (already there)
• stat.error.sys
• change def. of time.expo -> exposure length

UCDs for Planetology

Work on this topic started after french VO tutorial (oct 2004):

• Planetary Data System -> VO
• Space Time Coordinates: changes are needed

• VO planeto activities:
  • 13 new UCDs and 8 modifications
  • provide VOTable output of planetary data
  • Data Model
  • Extension of activities, involvement of community, and link with EuroPlanet

• Expected results for first VO-compatible applications, end of 2005

Discussion:

Pedro Osuna: discuss with ESA (about collaboration with NASA). Andy Lawrence: AstroGrid covers solar data - are there UCDs there

General DM-UCD discussion:

• GL asks to clarify difference between UCD and utypes ? utypes = pointers for serialization of DMs ucd = can be simpler, able to generalize with the 1st word: UCD = one-word data model (when we don't need to go into the details)

• On the question of merging UCD (or semantics) in the DM (or modelling) activity -> JCM: good idea to keep the vocabulary separate from the DM structure for the moment

• APM proposal:
  • keep WG
  • add 'semantics' to UCD in the WG's name
  • have standard list of words (stabilisation) before summer 2005
  • don't try to do an ontology immediately

Joint session with VOEvent

AA summarizes result of discussions on UCD that took place during yesterday's VOEvent session

Discussion on VOEvent

• Allow a 6 months period for the definition of a list of standard expressions used by the VOEvent producers.

• Discuss possible changes to the schema about <Hypothesis> contents within the VOEvent-core list after this meeting.

UCD board creation:

• Scientific board:
  • APM sends a message: those answering within 10 days will be part of the scientific board
  • The board discusses on words evolution/modifications/suppression/addition
  • The first board leader will be the leader of the WG. Later on, the board will choose a scientific leader. The WG leader can take final decisions.
  • End of may: first board is composed, ready to work
  • Work in june on list of work
  • Then, move list of words to PR

• Technical board:
  • In charge of building software and tools
  • Creation process same as sci. board

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