Ricardo Amador

Title: K4R– Knowledge to the power of RESTful, Resourceful and Reactive Rules

Abstract. The Web of today clearly answers questions of the form “What is the
representation of ...?”. The Semantic Web (SW) of tomorrow aims at answering
questions of the form “What is the meaning of ...?”. It is our stance that in order to
realize the full potential of the original concept proposed by Tim Berners-Lee et
al. (in Scientific American, May 2001), the SW must also answer, in a meaningful
way, questions of a dynamic and active nature, like “What to do if ...?” or “What
to do when ...?”. Moreover, SW questions of the form “What to do ...?” must
be expressed and answered in a declarative, compositional and language agnostic
way. It is our (hypo)thesis that formally established concepts, viz. the Web’s
REST architectural style, declarative SW representation of resources based on
Description Logics (e.g., OWL-DL), and Reactive Rules (e.g., “on Event if Condition
do Action” –ECA– rules), provide the proper theoretical foundations to
achieve this goal. This paper describes our current research proposal, K4R (pronounced,
with an Italian flavor, “Che fare?”), towards achieving a declarative
model for expressing (re)active behavior in and for the SW.