An active object-oriented knowledge base server can provide many desirable features for supporting a wide spectrum of advanced and complex database applications. Knowledge rules, which are used to deene a variety of DB tasks to be performed automatically on the occurrence of some events, often need much more sophisticated rule speciication and control mechanisms than the traditional priority-ba...

Most work on building knowledge bases has focused on collecting entities and facts from as large a collection of documents as possible. We argue for and describe a new paradigm where the focus is on a high-recall extraction over a small collection of documents under the supervision of a human expert, that we call Interactive Knowledge Base Population (IKBP).

Knowledge base update has been given much attention in the AI literature. The best-known solution to this problem is Winslett's PMA formalism. In this paper we propose di erent intuitions standing behind knowledge base update. Roughly speaking, we consider an update formula not as an e ect of an action to be performed, but rather as an observation about dynamically changing world made by an age...

The attribute set A for the MutualFriends task contains name, school, major, company, hobby, timeof-day preference, and location preference. Each attribute a has a set of possible values (entities) Ea. For name, school, major, company, and hobby, we collected a large set of values from various online sources.14 We used three possible values (morning, afternoon, and evening) for the time-of-day ...

Recently, the development of knowledge bases is considered to be a process of extending an ontology with specific knowledge of a particular application. Reuse of pre-existing knowledge sources gives rise to knowledge bases endowed with a common and standard terminology. But, reuse often requires an enormous effort, so few knowledge-based applications have arisen following this approach. In this...

In this paper, we study the problem of exchanging knowledge between two knowledge bases (KBs) connected through mappings, with a special interest in exchanging implicit knowledge, not only data like in the traditional database exchange setting. As representation formalism we use Description Logics (DL) that exhibit a reasonable tradeoff between expressive power and complexity of reasoning. Thus...

a water jet machining is an industrial tool capable of cutting a wide variety of materials using avery high-pressure jet of water, or a mixture of water and an abrasive substance. this paperaddresses the concept of the intelligent knowledge base system (ikbs) for optimization of productdesign and manufacturing process for water jet machining in computer based concurrentengineering environment. ...

We present an approach to similarity-based retrieval from knowledge bases that takes into account both the structure and semantics of knowledge base fragments. Those fragments, or analogues, are represented as sparse binary vectors that allow a computationally efficient estimation of structural and semantic similarity by the vector dot product. We present the representation scheme and experimen...