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PIL OWL Ontology Meeting 2011-08-02
Contents
- 1 Meeting Information
- 2 Attendees
- 3 Background
- 4 Agenda
- 5 Discussions
Meeting Information
prov-wg - Modeling Task Force - OWL group telecon
- date: 2011-08-02
- time: 9am PT, 12 noon ET, 5pm UK
- via Skype conversation call - Satya hosting
- wiki page: http://www.w3.org/2011/prov/wiki/PIL_OWL_Ontology_Meeting_2011-08-02
- titanpad: http://titanpad.com/lExgp045YP
- next meeting
Attendees
- Tim
- Satya
- Khalid
- Daniel
- James
Background
http://www.w3.org/2011/prov/wiki/WorkingDrafts
Agenda
Discussions
Group organization
Tim: Jim McCusker is joining the group, but not in today's telecon
Wiki page
http://www.w3.org/2011/prov/wiki/PIL_OWL_Ontology
Reuse - time and location
Daniel: looking at OWL doc and html. Propose reusing wgs and owl time for Time and Location. James: use directly or recommend?
Time ontology has interval and instant.
TODO: Tim to dig up his owl time diagram.
TODO: refering from OWL class to the Conceptual Model. (e.g., why is "Time" in this ontology?)
Time: process execution and BOB
- Beginning of a process, end of a process
- use and generation
- derivation has temporal
Khalid: this class is abstract class and people instantiate or extend it with their vocab?
Daniel: list recommendations. We don't constrain them to use one.
Tim: keep it general, but elaborate with OWL time and WGS (which people can grab and use). (RESOLVED)
Satya: http://www.w3.org/TR/owl-time/#calclock
Daniel: we have PIL types, but will offer subclasses that people will use.
James: pil:Time but not saying anything about it, then saying "if you want, equiv it to dateTimeDescription".
James: two levels, 1) "there are times, there are locations." 2) concrete "wgs and owl time"
Satya: Reference and domain.
topic: elaborated and unelaborated ontologies vs. a single elaborated ontology.
- theoretical vs. practical application uses
Daniel: group agreed that we are NOT defining time or location.
Missing relationship between generation/use/derivation and Time/Location
Missing relationship between generation/use/derivation and Time/Location. (Daniel G)
pe_1 generated b_1 . pe_1 occuring_at_location loc_1 .
Daniel: do not rely on rules.
Daniel: modeling n-ary as classes makes it difficult to use inference.
Help avoid using owl:Classes:
- generated_at_time
- generated_at_location
Should these be pushed back to the conceptual model?
Roles
Roles are not represented yet
TODO: Daniel (to do): Role examples from Journalism scenario
Arities (i.e., cardinalities)
how many bobs are derived from another bob. how many bobs does a process
TODO: Khalid to try to find some cardinaltity constraints
HTML document
How to get the HTML file? From the w3c repository.
http://www.w3.org/2011/prov/wiki/Mercurial_repository http://www.w3.org/2011/prov/wiki/MercurialRepository
RESOLVED: The wiki is the "starting point" and will be transitioned to the HTML document. RESOLVED: Things that don't make it to the HTML will be archived in the wiki page.
process execution
"continuous" interval of time.
http://dvcs.w3.org/hg/prov/raw-file/default/model/ProvenanceModel.html#concept-ProcessExecution
Satya concerned about "it doesn't occupy the entire interval".
(did we address this?)
Generation
http://dvcs.w3.org/hg/prov/raw-file/default/model/ProvenanceModel.html#concept-Generation
TODO: "role" - role of the generated BOB?
TODO: Tim to describe roles of input and params.
Diagrams
TODO: Tim to revisit his graphml output
http://dvcs.w3.org/hg/prov/raw-file/default/ontology/ProvenanceFormalModel.html
TODO: we want diagrams in section 2 http://dvcs.w3.org/hg/prov/raw-file/default/ontology/ProvenanceFormalModel.html#owl2-encoding-of-the-provenance-model
Entailments
Satya: start by describing it in HTML, then move to OWL when we have clarity on how it should be modeled.
TODO: James add something to section 3 (entailments)
James: They might not belong in the ontology but in the semantics document. Luc mentioned we should know what we are expecting or not expecting with entailments.
Satya: RDFS/OWL entailments. Other stuff needs to be described in the entailments section (as rules?).
Q: why is "is" used in the relationships, and not "was"? -Tim
References
- OWL-Time,
- RDF
- OWL
- BFO,
- DOLCE
Next meeting
Monday. We'll figure out time over email. 9am California 12 noon 5pm UK