Xcerpt and XChange: Deductive Languages for Data Retrieval and Evolution on the Web

Data Retrieval and Evolution on the (Semantic) Web: A Deductive Approach

To make use of data represented on the Semantic Web, it is necessary to provide languages for Web data retrieval and evolution. This article introduces into the (conventional and Semantic) Web query language Xcerpt and the event and update language XChange, and shows how their deductive capabilities make them well suited for querying, changing and reasoning with data on both the conventional an...

Xcerpt and XChange - Logic Programming Languages for Querying and Evolution on the Web

A Contribution to the Semantics of Xcerpt, a Web Query and Transformation Language

Xcerpt [1] is a declarative and pattern-based query and transformation language for the Web with deductive capabilities. In contrast to Web query languages like XQuery and XSLT [2,3], Xcerpt relies on concepts and techniques from logic programming and automated theorem proving such as declarative “query patterns” and “rule chaining”. Xcerpt can also be used for querying Web metadata, like OWL o...

The language Xchange: a declarative approach to reactivity on the web

The research topic investigated by this thesis is reactivity on the Web. Reactivity on the Web is an emerging research issue covering: updating data on the Web, exchanging information about events (such as executed updates) between Web sites, and reacting to combinations of such events. Following a declarative approach to reactivity on the Web, a novel reactive language called XChange is propos...

Xcerpt et visXcerpt : langages déductifs d'interrogation du Web

Web Query languages like XPath, XQuery and XSLT are widely accepted tools for the development of Web applications today. This article presents and motivates two new and experimental query languages for the Web: Xcerpt and visXcerpt (see http://xcerpt.org). Both languages are based on the same principles. They are deductive languages, which is one of their central aspects: they use a sort of uni...