PI Meeting Breakout Outbriefs

This page contains DAML summaries of the results of breakout discussion sessions at DAML PI meetings. The ontology is available in N3 and DAML formats.

Session scribes are asked to

download example.n3
add the results from their session
send the updated file to webmaster@daml.org.

This document is available at http://www.daml.org/2001/07/breakout/. It was generated directly from the N3 inputs using cwm, breakout.xsl, test.bat, and a version of DAML XSLT.

DAML-S

Significant Issues

How can we promote interchange?
What ought to be the relationship of the Process Model to Daml+OIL? To DAML+Rules?
Where do we fit in Web architecture? -> Declarative vs. procedural -> How will process model be used? -> Mimimal requirements for process model
Can we afford to wait for rules?
Core language does it need work? -> Need decidable fragment (we have a proposal)
Relationship between profile and process model
What are our goals with respect to Industry? -> Create a viable standard? -> Influence commercial standards efforts? -> Don't care; just do state-of-the-art research?
Tradeoffs involving expressiveness, simplicity, tractability

Plan of Action

2001-09-01: Connect more with industry - Ralph Swick can help
2001-09-01: Start publishing marked-up services
2001-09-01: Create a web page for user info, pointers
2001-09-01: Make discussions public
2001-09-01: 'Tie off' version 0.5, Finalize and document (provisional) solutions to expressiveness problems; Grounding; Identify and publish info rdf:about tractable subsets.
tbd: Make some tools available, hosted at daml.org, when ready; Profile Crawler & Registry; Matchmaker; Services editor
tbd: Evaluate alternative language bases for process modeling
tbd: Move forward on identified sub-problems (based on some assumptions rdf:about Daml-Rules); Ontology of rdf:resources, Time, execution model; Multi-party communications specification, exceptions, transactions
tbd: Continue to provide input to language/rules developers, and push for sanctioned solutions

Killer Applications

Significant Issues

Have to show why DAML provides unique value added
Killer app is NOT killer demo -> But, can use domain specific information to illustrate utility
Use combinations of current DAML tools to provide need functionality
App needs to satisfy needs of many different users in different roles
Must provide end-to-end life cycle capability
Producer ontologies different from user ontologies, need to match information across both

Plan of Action

2001-07-27: Establish daml-app mailing list and bulletin board
2001-09-01: Continue dialog on application and domain for illustration
2001-09-15: Goal for identifying specific killer apps is mid-September

Reasoning and Rules

Significant Issues

need for some sort of closed world negation?
need agenda/timeline for DAML-Rules language
DAML+OIL type languages and rules are both reasonably well understood (theory, algorithms implementations), but the union is not
how much must be captured in a proof/justification language? Just enough to validate? Chains of rules used?
clarifying relatioship of rules to some logical semantics.
rules need builtins for arithmetic, conversions, etc. Shouldn't assume any specific implementation language. Might distinguish light and heavy builtins.
relationship between query languages and rule antecedents.

Plan of Action

2001-08-01: W3C to create a public www-rdf-rules@w3c.org email list. Use www-rdf-logic in the mean time.
2001-08-01: create a DAML Reasoning web page on www.daml.org analogous to http://www.semanticweb.org/XSB/, to include pointers to implementations, etc.
2001-08-01: create a DAML Reasoning Working Group to include reasoning and query languages. Results could include DAML+OIL (upper level) ontologies (analogous to DAML-S) for queries and justifications.
2001-08-01: BBN to create a daml-reasoning@daml.org email list
2001-08-15: Pat Hayes, Ben Grosof, and Ian Horrocks to address how to combine DAML+OIL with logic programming more powerful than Horn: efficient subsets, etc. This may evolve into a rules proposal.
2001-09-30: DAML Reasoning Working Group to propose 'official' DAML+OIL Query Language.