1. GraniteOntologies Acquiring and Applying Ontologies in GraniteNights GraniteNights, Gunnar Aastrand Grimnes, CIA, August 2003. Gunnar Aastrand Grimnes, Stuart Schalmers, Pete Edwards & Alun Preece

2. Introduction & Talk Overview GraniteNights: Initially made for Agentcities Competition. Demo’ed @ AC ID3 in Barcelona, Feb. 03. GraniteNights also presetned in a “proper” talk @ CIA2003. Talk: Overview Ontologies Tools Conclusions

3. Screenshots I

4. Screenshots II GraniteNights remembers users and learns their preferences over time.

5. Architecture Diagram

6. Messages and Data in GN Everything is RDF, use as little SL as possible. Not just data: All messages are represented in RDF. Jade message envelopes are SL (but could be XML or RDF using the appropriate plugin). To support this several ontologies are needed.

7. Ontologies Re-use is the name of the game. Ontologies from Agentcities.RTD project: Shows (cinema) Restaurants Utilities ( address, time/dates etc. ) Home grown ontologies: Beer & Pubs ( based on Shoe example ontology ) Evening plans & User Profiles Query by Example

8. Tools Jena for handling RDF: Supports N3, great for hand-writing RDF, convert to RDF/XML. Frodo RDFSViz Home-made: Query By Example. Java “ontology classes” generator. Ontology driven “Classfiller” for generating instance data. XEmacs! The one and only text-editor!

9. Query By Example QBex is an RDF based query language. Variables & constraints are supported. Internally converted to RDQL: Brown SELECT ?x WHERE (?x, ?y, ?z), ( ?x,, ), ( ?x,, " Brown " )

10. QBeX : Variables Using an RDF based constraint interchange format, QBeX can represent expressions like: Query(X): { type(X, Restaurant), serves(X, Tandoori), openingTime(X,Y), Y>1900. }

11. Jena vocabulary classes Vocabulary Java files are generated directly from the XML files. Javadoc comments generated includes: Labels & Comments Sub and Super classes Range / Domain of Properties Support RDFS & DAML+OIL. Combined with Frodo RDFSViz it makes a powerful tool for understanding new ontologies.

12. Ontology driven Web form for RDF generation Fully web-based instance creator. Generates forms for each possible class. Forms have fields for each property of a class. Supports sub-class & sub-property inference. Supports DAML+OIL & RDFS ontologies. Written in PHP, using RDF API for PHP (RAP).

13. Conclusions Lightweight ontologies are more than sufficient. The representation powers of DAML+OIL are too much to handle. Jade agents + RDF/XML for message content work well! Using RDF makes interoperability and reusability a breeze. Several other projects in Aberdeen, re-using components of GraniteNights!

14. Wishlist for ontologies the future AC net: Standardise on OWL-Lite for ontology representation. Ontology repository which is used... …and which includes DOCUMENTATION :) And btw, what about using RDF/XML for all messages? … and a Jade plugin that will convert them to Java object(s)?

15. Questions?

16. QBeX – CIF Example x > 1900....

17. The single most important thing to remember from this talk: VOTE FOR US IN THE COMPETITION! Dr Pete EdwardsDr Alun PreeceGunnar GrimnesStuart Chalmers