We describe a knowledge server that permits Web users to retrieve and add knowledge in a shared knowledge base. The following features distinguish WebKB-2 from other ontology servers or KBMSs: (i) the ontology is large (at present, 69,000 categories and 87,800 links mostly coming from WordNet) and extendible at any time by any user, (ii) asynchronous cooperation between users is supported and e...

Assembling new software systems from prefabricated components as an attractive alternative to traditional software development practices is more and more investigated. Component technologies like CCM, .Net or EJB are accompanied by model-based approaches like MDA. However, still the emphasis is rather on system design and development and not on system validation and testing. The expected reduct...

JSON Rules is a declarative rule language for the World Wide Web. It has been created to satisfy at least the following list of requirements: (1) create and execute rules in browser; (2) support for ECA and PR rules; (3) the Working Memory contains event-facts. Here we extend the language with the concept of built-ins (predicates and actions). We focus on the relation with RIF-DTB, however with...