Under the hood, fighting fires with realtime semantic web technology
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The document describes the development of a semantic web application to provide real-time information to firefighters. It starts with a proof of concept using PHP scripts and Google Maps to display incident information. Over time, it evolves to use RDF, Apache ActiveMQ for messaging, and a XULRunner interface. The application is expanded to a distributed, standards-based product using J2EE, Jena, and mobile interfaces. This allows nationwide deployment and integration of additional real-time and historical data sources.
![Vocabularies – Reuse!
● Events & relations ● Addresses
– VU SEM Simple Event – Vcard [4]
Model [1]
● Geo Locations ● Definitions
– W3C WGS84 Geo – SKOS [5]
vocabulary [2]
● Metadata ● Only 6 domain specific
– OWMS/Dublin Core [3] properties! [6]](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-25-320.jpg)
![Apache ActiveMQ
● JMS Broker [7]
– Opensource Java
● Multi protocol
● Scalable
– Single instance +10k queues
● Message Persistence
● Web based configuration / monitoring](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-27-320.jpg)
![Server software
● PHP Daemonized & REST
– Quick prototyping
– In house knowledge
● Semsol ARC2 [8]
– Triple store
– Multiple serializations
– Maintained and Documented
● Stomp [9]
– Standard messaging protocol
– Supported by ActiveMQ](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-29-320.jpg)
![Mozilla XULRunner
● Multi platform Gecko Engine ( Firefox ) [10]
● Package HTML + Javascript apps
– low level extras
● Certificate control
● Multi threading
● Window dressing
● No Cross domain policy issues !
– Mainstream JS libraries work perfectly](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-31-320.jpg)
![The Application
● Queue listener over HTTP
– Fetches Incident URI
● Rdfstorejs [11]
– Extract property values
● HTML OpenLayers web page [12]
– Show overview
– Zoom view if needed
● Auto restart on connection loss
● Software update-able](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-32-320.jpg)
![New Features
● Distribute SPARQL ● Introduce Agent
1.1[13] updates structure
– More fine grained control – Fetch external data
● Use WebID [14] for ● Move to another Triple
monitors store
– Single Sign On – Scalability
● Enterprise paterns ● Multiple interfaces
– J2EE Container – a.o. mobile](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-39-320.jpg)
![Distribution
● IBM WebSphere Application Server CE [15]
– J2EE Container
● Includes ActiveMQ
● Triplestore
– Jena TDB [16]
– IBM DB2 v10 Graph store [17]
● RESC.Info components
– Jena Based [18]
● Servlets
● Message driven beans](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-41-320.jpg)
![External Data
● Agents fetch external ● Traditional data sets
Data – CSV / SQL Databases
– Convert and insert linked ● D2RQ mapping [19]
data
● Linked Data sets
● Sources
– Sparql endpoint
– Linked data
– Dereferencing
● Historic Museum
– Traditional datasets
● Insert copy of data in
incident graph](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-43-320.jpg)
![User Interface
● Visualization is never a ● Technologies
goal – Enyojs [20]
– User demand rules – HTML5
● Multiplatform ● Beware of information
– Desktop overload
– Mobile ● WebID for authorization
● Data driven](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-45-320.jpg)
![Reference
● [1] http://semanticweb.cs.vu.nl/2009/11/sem/
● [2] http://www.w3.org/2003/01/geo/wgs84_pos
● [3] http://standaarden.overheid.nl/owms/4.0/doc
● [4] http://www.w3.org/2006/vcard/ns-2006.html
● [5] http://www.w3.org/TR/skos-reference/
● [6] http://vocab.resc.info
● [7] http://activemq.apache.org/
● [8] https://github.com/semsol/arc2/wiki
● [9] http://stomp.github.com/stomp-specification-1.1.html
● [10] https://developer.mozilla.org/en-US/docs/XULRunner](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-55-320.jpg)
![Reference
● [11] https://github.com/antoniogarrote/rdfstore-js
● [12] http://www.openlayers.org
● [13] http://www.w3.org/TR/sparql11-query/
● [14] http://www.w3.org/wiki/WebID
● [15] http://www-01.ibm.com/software/webservers/appserv/community/
● [16] http://jena.apache.org/documentation/tdb/index.html
● [17] http://www.ibm.com/developerworks/downloads/im/udbexp/
● [18] http://jena.apache.org/index.html
● [19] http://d2rq.org/
● [20] http://www.enyojs.com](https://image.slidesharecdn.com/semtechbizuk2012-full-120919063448-phpapp01/85/Under-the-hood-fighting-fires-with-realtime-semantic-web-technology-56-320.jpg)
Under the hood, fighting fires with realtime semantic web technology
- 1. Under the Hood Fighting Fires with Real- Time Semantic Web Technology Bart van Leeuwen / bart@netage.nl / @semanticfire
- 4. My Fear
- 5. 5
- 8. Reality
- 11. Agile
- 13. 14
- 14. Where it hurts most
- 15. Where it hurts most ● Shift in personnel origin ● Tools that just do not do it – Less 'native' Amsterdam – Answers to Questions we didn't ask – Deprived of local knowledge – Navigation system tells me next step, not the target adres – Depend a lot on new technology – Needs interaction
- 16. Navigation
- 17. Messages
- 18. Hands on!
- 19. Requirements ● Non interactive ● Overview – Always on – Station location – No keyboard or mouse – Incident location ● Outside fire truck ● Non abbreviated text – 10 seconds of relative – Expand to full text tranquility so limited information
- 20. Proof of Concept ● Over the air P2000 ● PHP Script Messages – Extract address – RS-232 connected – GeoCode with receiver GoogleMaps API ● Build URI Encoded ● Google Maps on web URL of message page ● Web Browser in Kiosk Mode
- 21. POC - Conclusion ● 'Great can you show ● 'I Work on another information X as well?' station can we get this – Data model needs to be as well?' extensible – Deployable software – Distributed infrastructure ● 'After a Windows update the maps looks wierd' – Client software should be under stricter control
- 23. Data Model
- 24. Why RDF? ● No clear overall picture ● Open data ready – Flexible model – Multiple serializations – Agile development ● Point to external data ● Web technology – Linked by definition – W3C Recommendation
- 25. Vocabularies – Reuse! ● Events & relations ● Addresses – VU SEM Simple Event – Vcard [4] Model [1] ● Geo Locations ● Definitions – W3C WGS84 Geo – SKOS [5] vocabulary [2] ● Metadata ● Only 6 domain specific – OWMS/Dublin Core [3] properties! [6]
- 26. Distribution
- 27. Apache ActiveMQ ● JMS Broker [7] – Opensource Java ● Multi protocol ● Scalable – Single instance +10k queues ● Message Persistence ● Web based configuration / monitoring
- 28. Queue Interaction ● P2000 message listener – REST Interface ● P2000 message decoder – Handled by php script ● Message distribution – 1 queue per attached monitor – Based on P2000 address code
- 29. Server software ● PHP Daemonized & REST – Quick prototyping – In house knowledge ● Semsol ARC2 [8] – Triple store – Multiple serializations – Maintained and Documented ● Stomp [9] – Standard messaging protocol – Supported by ActiveMQ
- 30. User Interface
- 31. Mozilla XULRunner ● Multi platform Gecko Engine ( Firefox ) [10] ● Package HTML + Javascript apps – low level extras ● Certificate control ● Multi threading ● Window dressing ● No Cross domain policy issues ! – Mainstream JS libraries work perfectly
- 32. The Application ● Queue listener over HTTP – Fetches Incident URI ● Rdfstorejs [11] – Extract property values ● HTML OpenLayers web page [12] – Show overview – Zoom view if needed ● Auto restart on connection loss ● Software update-able
- 33. Overview P2000 Windows ActiveMQ PHP Decoder Decoder P2000 input Queue Queue Listener Thin lines ActiveMQ are RDF monitor Queue XULRunner App ARC2 Triple Store
- 34. Current monitor
- 35. 37
- 36. Let's make a product
- 37. Publications
- 38. Product ● Interest outside Amsterdam ● Installable ● Local requirements ● Less control ● Portable clients
- 39. New Features ● Distribute SPARQL ● Introduce Agent 1.1[13] updates structure – More fine grained control – Fetch external data ● Use WebID [14] for ● Move to another Triple monitors store – Single Sign On – Scalability ● Enterprise paterns ● Multiple interfaces – J2EE Container – a.o. mobile
- 40. Distribution
- 41. Distribution ● IBM WebSphere Application Server CE [15] – J2EE Container ● Includes ActiveMQ ● Triplestore – Jena TDB [16] – IBM DB2 v10 Graph store [17] ● RESC.Info components – Jena Based [18] ● Servlets ● Message driven beans
- 42. External Data
- 43. External Data ● Agents fetch external ● Traditional data sets Data – CSV / SQL Databases – Convert and insert linked ● D2RQ mapping [19] data ● Linked Data sets ● Sources – Sparql endpoint – Linked data – Dereferencing ● Historic Museum – Traditional datasets ● Insert copy of data in incident graph
- 44. User Interface
- 45. User Interface ● Visualization is never a ● Technologies goal – Enyojs [20] – User demand rules – HTML5 ● Multiplatform ● Beware of information – Desktop overload – Mobile ● WebID for authorization ● Data driven
- 46. Overview GMS Agent Agent Building Address Administration Inicident Initiator Incident Dispatcher Incident Manager J2EE Container Thin lines are XULRunner Jena SPARQL 1.1 Updates XULRunner App Triple Store App
- 49. Larger Context
- 50. Onward!
- 51. The Buzz ● Linked Data Fire Engine – Linked data bus on new fire engine ● 'Open Data' resonates – Organization – Nation wide advisory groups
- 52. My Fear
- 53. @Semanticfire
- 54. Under the Hood Fighting Fires with Real- Time Semantic Web Technology Bart van Leeuwen / bart@netage.nl / @semanticfire
- 55. Reference ● [1] http://semanticweb.cs.vu.nl/2009/11/sem/ ● [2] http://www.w3.org/2003/01/geo/wgs84_pos ● [3] http://standaarden.overheid.nl/owms/4.0/doc ● [4] http://www.w3.org/2006/vcard/ns-2006.html ● [5] http://www.w3.org/TR/skos-reference/ ● [6] http://vocab.resc.info ● [7] http://activemq.apache.org/ ● [8] https://github.com/semsol/arc2/wiki ● [9] http://stomp.github.com/stomp-specification-1.1.html ● [10] https://developer.mozilla.org/en-US/docs/XULRunner
- 56. Reference ● [11] https://github.com/antoniogarrote/rdfstore-js ● [12] http://www.openlayers.org ● [13] http://www.w3.org/TR/sparql11-query/ ● [14] http://www.w3.org/wiki/WebID ● [15] http://www-01.ibm.com/software/webservers/appserv/community/ ● [16] http://jena.apache.org/documentation/tdb/index.html ● [17] http://www.ibm.com/developerworks/downloads/im/udbexp/ ● [18] http://jena.apache.org/index.html ● [19] http://d2rq.org/ ● [20] http://www.enyojs.com