Putting topic maps to rest.tmra2010

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Putting topic maps to rest.tmra2010

  1. 1. 1 Putting Topic Maps to REST David Damen, Maria Patrickson Putting Topic Maps to REST September 30th 2010
  2. 2. 2 What did we want? • Remote access: – Manipulate topic maps – Manipulate topics – Search • RESTful Putting Topic Maps to REST September 30th 2010
  3. 3. 3 What is out there? • TMRAP: – Part of Ontopia – Limited in functionality – Not exactly RESTful • Topincs: – Better in functionality, but not entirely • TMIP: – Built on top of path expression Topic Maps query language – Complicated Putting Topic Maps to REST September 30th 2010
  4. 4. 4 Resources Representations REST Self-descriptive HATEOAS messages Putting Topic Maps to REST September 30th 2010
  5. 5. 5 HATEOAS • Hypermedia As The Engine Of Application State – RESTful webapp should be modelled as a state machine – Client transitions from state to state – Representations contain valid state transitions Putting Topic Maps to REST September 30th 2010
  6. 6. 6 HATEOAS – online book store Add payment • Book 1 information • Shipping • Book 2 • Credit card method • Book 3 • Address • Gift options Confirm Fill basket order Putting Topic Maps to REST September 30th 2010
  7. 7. 7 REST Topic Maps engine Tropics Community support Putting Topic Maps to REST September 30th 2010
  8. 8. 8 Tropics – resources • Topic Maps • Topics • Associations • Query results IRIs as item identifiers IRIs as occurrences in a navigation ontology Putting Topic Maps to REST September 30th 2010
  9. 9. 9 Tropics – identifying resources • /topics/earth • /topics/earth?ti=/topicmaps/astronomy • /topics/earth?ti=/groups/space Putting Topic Maps To REST September 30th 2010
  10. 10. 10 Tropics – representations • As a Topic Map: – XTM 2.0/2.1 – CXTM – JTM • Other formats can support most (but not all) resources: – CTM – LTM Putting Topic Maps to REST September 30th 2010
  11. 11. 11 Tropics – messages • HTTP: – GET – PUT – POST – DELETE Putting Topic Maps to REST September 30th 2010
  12. 12. 12 Tropics - HATEOAS • Application state in a Topic Maps engine? • What is a Topic Maps engine is used for? Putting Topic Maps to REST September 30th 2010
  13. 13. 13 Tropics - HATEOAS • Information extraction: – Querying – Navigation • Application state for a Topic Maps engine: – The piece of information retrieved • State transition for a Topic Maps engine client: – Traversal from one piece of information to the next – Querying – Administrative functions Putting Topic Maps to REST September 30th 2010
  14. 14. 14 Knowledge navigation – example Celestial Body Planet Sattelite Planet Star Mars ATLAS Mars Earth Earth picture Sun weight weight Putting Topic Maps to REST September 30th 2010
  15. 15. 15 Knowledge navigation – intra Topic Map navigation Celestial Body Planet Sattelite Planet Star Mars ATLAS Mars Earth Earth picture Sun weight weight Putting Topic Maps to REST September 30th 2010
  16. 16. 16 Knowledge navigation – extra Topic Map navigation Celestial Body Planet Sattelite Planet Star Mars ATLAS Mars Earth Earth picture Sun weight weight Putting Topic Maps to REST September 30th 2010
  17. 17. 17 Knowledge navigation – merged Topic Map navigation Celestial Earth Body weight picture Planet Sattelite Planet Star Mars ATLAS Mars Earth Earth picture Sun weight weight Putting Topic Maps to REST September 30th 2010
  18. 18. 18 Tropics – navigation ontology Putting Topic Maps to REST September 30th 2010
  19. 19. 19 Tropics – example – Earth Topic Create Topic Parameter Planet Link query Earth alias query weight Search the alias q engine data type Xsd:string uri http://.../search method GET Putting Topic Maps to REST September 30th 2010
  20. 20. 20 Tropics – Is HATEOAS worth it? • Open question… Putting Topic Maps To REST September 30th 2010
  21. 21. 21 Tropics – proposed URI space • /topicmaps/{id} • /groups/{id} • /topics/{id} • /associations/{id} • /search • Query/filter parameters • Versioning => More detailed info in the API definition at http://j.mp/tropics-api Putting Topic Maps to REST September 30th 2010
  22. 22. 22 Tropics – current status • /topicmaps – GET • /topicmaps/{id} – GET, PUT • /groups/all – GET • /topics – GET (only ‘has-type’) • /topics/{id} - GET • /search - GET (supports ‘tolog’) • (Will be) part of Ontopia Sandbox • Open for participation! Putting Topic Maps to REST September 30th 2010
  23. 23. 23 Acknowledgement • Tropics: • David Damen • Maria Patriksson This work has received funding from the European Commission through the Seventh Framework Programme (FP7/2007-2013) under the Space Theme, under grant agreement n◦218815 within the ULISSE Project (USOCs KnowLedge Integration and Dissemination for Space Science Experimentation). Putting Topic Maps to REST September 30th 2010
  24. 24. 24 Questions? Thank you for your time! Putting Topic Maps to REST September 30th 2010

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