making sense of design patterns
DESCRIPTION
TRANSCRIPT
Making Sense of Design Patterns
Rinke [email protected], [email protected]
Joost [email protected]
There must be a reason why certain
patterns are more useful than others
+ BONUS DP!!!
What’s a good Design Pattern?
• Categorise– Logical, content, lexico-syntactic, ...
• Submit and Review– http://ontologydesignpatterns.org – Incentive to share?
• ... preliminary evaluation results (Blomqvist et al., 2009)
• Criteria– Mix required metadata, with quality criteria– Pros and cons, competency questions– “cognitively relevant” and “best practices”
Linguistics
• Linguistic expressions follow cognitive rules (Pinker, 2007)
– Recurring structures in language– Can be reapplied to create new meaning– Signal fundamental concepts of thought
“We gather our ideas, put them into words, and if our verbiage is not empty or hollow, we might get these ideas across to a listener, who can unpack our words to extract their content”
“Give a muffin to a moose” vs. “Give a moose a muffin”“Biff drove the car to Chicago” vs. “Biff drove Chicago the car”
Design Decisions
Conceptual Model
Two Sides to a Coin
• ... KADS, CommonKADS– “Knowledge modelling” (van Heijst et al., ‘97)
• Design patterns bridge the gap– they are specific to a KR language– ... but commit to a conceptual model that exists
independently of it
DPs Ontology
Fundamental Design Decision
• Design patterns– commit to a conceptualisation– express a structure in a language– thereby exclude other solutions
• Well known commitments...– Binary vs. n-ary relations (action)– Relative vs. absolute (time, place)– Reification vs. abstraction (roles)
Are roles classes or relations?
Roles
Are roles classes or relations?
BONUS DP!!!
Rinke Hoekstra. Representing Social Reality in OWL 2. In Evren Sirin and Kendall Clark, ed., Proceedings of OWLED 2010, June 2010
Searle, The Structure of Social Reality, 1995
It’s like Legotm!
Discussion• Message: move beyond best practices• Design patterns
– Capture fundamental design decisions, – Recurrent structures that reflect cognitive notions– Bridge the gap between conceptualization and
implementation.– Give insight in expert knowledge
• What next?– Domain theories, but also linguistics and cognition– Harvest recurring patterns in existing ontologies– Assess tradeoffs, i.e. discover design decisions– Design patterns as index to a library of ontologies
There’s more in the paper...
• Five requirements for design patterns• Structure patterns• ... much more detail
Rinke [email protected] / [email protected]
There’s also a book
Rinke Hoekstra. Ontology Representation – Design Patterns and Ontologies that Make Sense. IOS Press, 2009