While WS-BPEL is emerging as the prominent language for modeling executable business processes, it provides limited support for designing flexible processes. An important need of ...
This paper describes the design of a crawler devised to perform the periodic retrieval of Web documents for a search engine able to accept on-line updates in a concurrent manner. ...
Database systems are a key component behind many of today's computer systems. As a consequence, it is crucial that database systems provide correct and continuous service des...
Context-aware applications adapt their behavior depending on changes in their environment context. Programming such applications in a modular way requires to modularize the global ...
Middleware-based database replication protocols require few or no changes in the database engine. As a consequence, they are more portable and flexible than kernel-based protocols...