Web services are expected to be the key technology in enabling the next installment of the Web in the form of the Service Web. In this paradigm shift, Web services would be treated as first-class objects that can be manipulated much like data is now manipulated using a database management system. Hitherto, Web services have largely been driven by standards. However, there is a strong impetus for defining a solid and integrated foundation that would facilitate the kind of innovations witnessed in other fields, such as databases. This survey focuses on investigating the different research problems, solutions, and directions to deploying Web services that are managed by an integrated Web Service Management System (WSMS). The survey identifies the key features of a WSMS and conducts a comparative study on how current research approaches and projects fit in.

Abstract. The problem that “XML formally governs syntax only- not semantics ” has been a serious barrier for XML-based data integration and the extension of current Web to Semantic Web. To address this problem, we propose the XML Semantics Definition Language(XSDL) to express XML author’s intended meaning and propose a model-theoretic semantics for XML. Consequently, XML becomes a sub-language of RDF in expressiveness and XML data can be semantics-preserving transformed into RDF data. We further discuss the semantic entailment and validity of the XML documents. 1

Abstract. The semantics of an XML-based language can be specified by mapping an XML schema to an ontology, thus enabling the wide range of XML applications to contribute to the Semantic Web. The Krextor XML→RDF extraction framework proposes a practical solution to this problem, novel in its extensibility. We present its architecture and show how it can easily be extended to support additional input and output languages. 1 Introduction: Semantic Markup and RDF In the well-known and hotly debated layer cake architecture of the Semantic Web (see [9] for a survey of its different incarnations), XML has always been placed below RDF. This must not be misunderstood in a way that XML should only be used for encoding higher-layer formalisms like RDF or OWL in a standardized way

Abstract Web services are expected to be the key technology in enabling the next installment of the Web in the form of the Service Web. In this paradigm shift, Web services would be treated as first-class objects that can be manipulated much like data is now manipulated using a database management system. Hitherto, Web services have largely been driven by standards. However, there is a strong impetus for defining a solid and integrated foundation that would facilitate the kind of innovations witnessed in other fields, such as databases. This survey focuses on investigating the different research problems, solutions, and directions to deploying Web services that are managed by an integrated Web Service Management System (WSMS). The survey identifies the key features of a WSMS and conducts a comparative study on how current research approaches and projects fit in. Keywords Service-oriented computing · Interoperability · Web service management system

Abstract: XML has become the de facto standard for representing and accessing data on the Web. At the same time RDF is becoming more and more popular for representing metadata. While RDF also has an XML-based syntax, storage and query technologies for the two formats are not compatible due to differences in the data model. This is a potential problem when trying to query data that combine XML data with RDFbased metadata annotations. In this paper, we investigate the feasibility of querying such embedded RDF models with XML technologies. We motivate the problem using the vision of intelligent content objects, describe an approach for querying RDF data with XQuery and identify problems and opportunities based on experiments with real world data. 1