1. Semantics: Session 3 Joint Session: Semantics, VOEvent(, Theory, Registry)

2. Agenda: Using vocabularies –VOEvent –Vocabularies and the registry (SD) Discussion on how to exploit the vocabularies in a VO, e.g. by VOEvent, theory, the registry, etc. A draft vocabulary for simulations (F.Le Petit)

3. Vocabularies: Open Issues (1/3) 1. Format of the master vocabulary: nothing mandated 2. Format of the distributed vocabularies: mandating RDF/XML (Turtle optional) Identifying vocabulary versions: Unversioned namespace. Vocabulary maintainers keep old RDF files available long-term.

4. Vocabularies: Open Issues (2/3) 4. Who maintains vocabularies? Author (IG/WG adopting the vocabularies ) = maintainer. Semantics for those (5) in WD plus IVOAT What vocabularies are included in the standard? The 5 in the WD (A&A, UCD, IAU93, AVM, Contellations). IVOAT (replacing IAU93) in separate doc.

5. Vocabularies: Open Issues (3/3) 6. Inclusion of mappings in vocabularies recommended that vocabularies declare no inter-vocab mappings; such mappings are published separately; mappings declared in one direction; metadata required in a mapping file: DC terms; how to generate mappings: wiki-like thing.

6. Possible events (Roy’s list - Victoria06): Lensing event (MACHO) Gravitational wave signal Asteroid / KBO M dwarf flare Unknown radio transient Transit of extra-solar planet

7. Possible events (Roy’s list - Victoria06): Lensing event (MACHO) –IAU93:microlensing –AOIM:Cosmology Phenomenon Lensing –IVOAT:gravitationalMicrolensing Gravitational wave signal –IAU93:gravitational wave –IVOAT:gravitationalWave –A&A: Gravitational waves

8. Asteroid / KBO –AOIM: Interplanetary Body: Asteroid –IAU93: asteroids –IVOAT: asteroid –A&A: Minor planets, asteroids –IVOAT: EdgeworthKuiperBeltObject (KBO) M dwarf flare –IAU93: flarestars>dwarfstars>Mdwarfstars –IVOAT: redDwarfFlareStar –AOIM: Star: Type: Variable: Flare Star

9. Unknown radio transient –IAU93: radiosources>variablesources Transit of extra-solar planet –IAU93:transit; planets>extrasolarplanets –IVOAT:transit; extrasolarPlanet –AOIM:PlanetSpecialCasesTransiting