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Engineering Semantic Web Information Systems in Hera
This paper addresses the Hera design methodology and shows how RDF(S) has proven its value in combining all relevant aspects of WIS design, thus illustrating how Hera allows the engineering of Semantic Web Information Systems (SWIS).
Towards distributed processing of RDF path queries
- H. Stuckenschmidt, R. Vdovjak, J. Broekstra, G. Houben
- Computer ScienceInt. J. Web Eng. Technol.
- 1 December 2005
This paper presents an architecture for querying distributed RDF repositories by extending the existing Sesame system, discusses the implications of the architecture and proposes an index structure as well as algorithms for query processing and optimisation in such a distributed context.
Specification framework for engineering adaptive web applications
This paper concentrates on Web applications that automatically generate hypermedia presentations for their output, and presents a specification framework called Hera, related to design methodologies for Web applications, and in particular to RMM for its coverage of aspects of hypermedia design.
Hera: Development of Semantic Web Information Systems
Hera is a model-driven methodology supporting WIS design, focusing on the processes of integration, data retrieval, and presentation generation, which show how in Hera all these processes lead to data transformations based on RDF(S) models.
An RMM-Based Methodology for Hypermedia Presentation Design
A specification framework that considers the possibility of dynamically gathering information from a collection of structured, but also possibly heterogeneous sources (relational or object-oriented databases, XML repositories etc.).
Index structures and algorithms for querying distributed RDF repositories
This paper presents an architecture for querying distributed RDF repositories by extending the existing Sesame system, and proposes an index structure as well as algorithms for query processing and optimization in such a distributed context.
RAL: an algebra for querying RDF
- F. Frasincar, G. Houben, R. Vdovjak, P. Barna
- Computer ScienceProceedings of the Third International Conference…
- 12 December 2002
This paper proposes RAL, an RDF algebra suitable for defining (and comparing) the semantics of different RDF query languages and (at a future stage) for performing algebraic optimizations.
Embedding information retrieval in adaptive hypermedia: IR meets AHA!
The goal of this research is to define a framework for AH with extended IR functionality, characterized by the application of concepts from the SW paradigm leading to an enriched notion of concept relevancy.
Methodologies for Web information system design
- P. Barna, F. Frasincar, G. Houben, R. Vdovjak
- Computer ScienceProceedings ITCC . International Conference on…
- 28 April 2003
It is argued that besides the quality of the navigation that is typical for Web (hypermedia) data also the adaptation of the presented content is a desired feature of a modern WIS.
RAL: An Algebra for Querying RDF
The data model, the operators to manipulate the data, and the application of RAL for query optimization are defined, which includes: extraction operators to retrieve the needed resources from the input RDF model, loop operators to support repetition, and construction operators to build the resulting RDF models.