We develop query relaxation techniques for regular path queries and combine them with query approximation in order to support flexible querying of RDF data when the user lacks know...
data model provides an abstract, conceptual framework; a concrete syntax is also required and XML is used for this purpose. The XML namespace mechanism serves to identify RDF Schem...
Wikipedia is an example of the large, collaborative, semi-structured data sets emerging on the Web. Typically, before these data sets can be used, they must transformed into struc...
This paper studies the problem of extracting data from a Web page that contains several structured data records. The objective is to segment these data records, extract data items...
This paper describes an approach for a composition of web services based on their semantic descriptions. The process section of OWL-S service descriptions is built with references...