IVOA Semantics Working Group

The Semantics Working Group has supersed the UCD Working Group, effective from June 20th, 2006.

Charter of the WG

Charter for the Semantics WG, approved by EXEC on 17 May 2006:

WG chair: SebastienDerriere, vice-chair: TBD.

The UCD1+ controlled vocabulary Version 1.23 : IVOA Recommendation 02 April 2007

Maintenance of the list of UCD words Version 1.20 : IVOA Recommendation 28 May 2006

The UCD1+ controlled vocabulary Version 1.11 : IVOA Recommendation 31 December 2005

An IVOA Standard for Unified Content Descriptors Version 1.10 : IVOA Recommendation 19 August 2005

Documents, releases and drafts are in the VocabulariesWorkingArea

Astronomical Keywords in the era of the Virtual Observatory, IVOA Note AstroKeysTN-20070425.pdf

Ontology of Astronomical Object Types
text: WD_2007-02-19.pdf
OWL file (2008MAY16): ObjectTypes_0.99r.owl

Version 1.2 of the The UCD1+ controlled vocabulary : PR in the RFC period (till Nov 3 2006).
The RFC period is now closed. Comments (2) and answers can be found at the RFC page at http://www.ivoa.net/twiki/bin/view/IVOA/UCDListRFC. Comments were accepted and the proposed slight changes were included in version 1.21 of the document : PR-version1.21. Slight changes following comments by WG/IG chairs were included in version 1.22 of the document: PR-version1.22
IVOA Vocabularies:, WD v0.11 pdf , html
The IVOA Standard Vocabulary (Processes, Object types, Instrumentation,..) Version 0.8 (20060505) : VO-standard-vocabulary_8.pdf
TN: Ontology of Astronomical Object Types, text: ObjectTypes.pdf, Javadoc files: OWLDOC-ObjectTypes.zip or OWLDOC-ObjectTypes_tar.gz
VO-standard-vocabulary Vers. 0.5 of 20051220 (.pdf)
http://www.ivoa.net/twiki/bin/view/IVOA/UCDmaintenanceRFC
http://www.ivoa.net/twiki/bin/view/IVOA/UCDListRFC
Electromagnetic spectrum division v0.3: .html, .pdf
Proposed revision (2003): UCD-1.9.9 (.pdf, .doc) and UCD-1.9.9b (.pdf, .doc)

Semantics
- The EuroVO project, VOTech, has a work package DS5: Intelligent Resource Discovery which is focussed on developing astro semantics with the goal of making resource discovery and use more user-oriented. This area of VOTech is led by SebastienDerriere.
  - That page also has some useful links
UCDs
- The list of proposed RFM discussed in the WG can be found at http://www.ivoa.net/twiki/bin/view/IVOA/UCDwordsRFM
- The web-based form for requesting a modification (RFM) of UCD words can be found at: http://cdsweb.u-strasbg.fr/UCD/cgi-bin/comment/ucdComments
- UCD page at CDS: http://cdsweb.u-strasbg.fr/UCD/
- Tools to find and build UCDs: http://cdsweb.u-strasbg.fr/UCD/cgi-bin/descr2ucd

Date	Event	status
Oct-2004	UCD1+ to PR (RFC)	done
May-2005	UCD-Tools	done
Jun-2005	Create Sci- and Tech-Boards	done
Jul-2005	UCD1+ word-list to PR(RFC)	done (RFC after holidays)
Jul-2005	UCD1+: PR to Recomm	done (in Aug, minor editing needed)
Oct-2005	UCD1+ word-list: PR to Recomm	in progress
Oct-2005	From UCDs to Semantics	proposed in Kyoto
Nov-2005	UCD1+ Words Maintenance	Working Draft
Dec-2005	UCD1+ word-list: Recomm	done (31Dec2005)
May-2006	UCD1+ Maintenance: Recomm	done (28May2006)
End-2006	Ontologies-TN	done (31Oct2006)
End-2006	Standard Vocabulary-TN	draft
Feb-2007	Ontology-WD?
Apr-2007	UCD1+ word-list: Recomm	(2Apr2007)
Oct-2007	Ontology-UseCase TN

General working-group discussion archive. See the UCD archive for discussion prior to June 20th, 2006.
UCD Scientific Board archive
UCD Technical Board archive.