Here are the slides from my Property Reactive presentation at RuleML2013
http://www.slideshare.net/MarkProctor/property-reactive-ruleml-2013
http://www.slideshare.net/MarkProctor/property-reactive-ruleml-2013
Here is the paper that was published on the subject, and goes into a lot more detail than the presentation. The URL might change later:
https://www.dropbox.com/s/gcnjot1g3dvnivn/property-reactive.pdf