Querying Embedded RDF Data with XML Technology: A Feasibility Study
نویسندگان
چکیده
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.
منابع مشابه
Labeling RDF Graphs for Linear Time and Space Querying
Indices and data structures for web querying have mostly considered tree shaped data, reflecting the view of XML documents as tree-shaped. However, for RDF (and when querying ID/IDREF constraints in XML) data is indisputably graph-shaped. In this chapter, we first study existing indexing and labeling schemes for RDF and graph data in general with focus on support for efficient adjacency and rea...
متن کاملDeveloping a BIM-based Spatial Ontology for Semantic Querying of 3D Property Information
With the growing dominance of complex and multi-level urban structures, current cadastral systems, which are often developed based on 2D representations, are not capable of providing unambiguous spatial information about urban properties. Therefore, the concept of 3D cadastre is proposed to support 3D digital representation of land and properties and facilitate the communication of legal owners...
متن کاملFour Lessons in Versatility or How Query Languages Adapt to the Web
Exposing not only human-centered information, but machine-processable data on the Web is one of the commonalities of recent Web trends. It has enabled a new kind of applications and businesses where the data is used in ways not foreseen by the data providers. Yet this exposition has fractured the Web into islands of data, each in different Web formats: Some providers choose XML, others RDF, aga...
متن کاملIntegrating XQuery-enabled SCORM XML Metadata Repositories into an RDF-based E-Learning P2P Network
Edutella is an RDF-based E-Learning P2P network that is aimed to accommodate heterogeneous learning resource metadata repositories in a P2P manner and further facilitate the exchange of metadata between these repositories based on RDF. Whereas Edutella provides RDF metadata repositories with a quite natural integration approach, XML metadata repositories have to overcome considerable incompatib...
متن کاملTowards Data-Integration on the Semantic Web: Querying RDF with Xcerpt
Although RDF is serialized using XML, the many possible syntactic forms and the need for inferencing make it difficult to query RDF using existing XML query languages. Numerous new query languages for RDF with built-in knowledge about the semantics of particular inferencing formalisms like RDF Schema and OWL have been proposed or are currently under development. However most, if not all, are sp...
متن کامل