The vision of the semantic Web community is to create a linked “Web of data” providing ubiquitous data access via machine understandable links between data resources. Due to the need of enormous expertise for producing and consuming linked data, the idea of linked data emerges only slowly and only a few data sources are currently ...

Many institutions grant access to their metadata repositories via the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). However, this protocol has two significant drawbacks: it does not make its resources accessible via dereferencable URIs (Uniform Resource Identifiers), and it provides only restricted means of selective access to metadata. The OAI2LOD server handles these shortcomings ...

Continously growing usage of XML (eXtensible Markup Language) data demands for development of powerful query optimization systems. Optimization approaches for XML databases depend on database type. Relational based XML DBMS (DataBase Management System) decompose documents into conventional or special binary relations. XQuery clauses in such systems are translated to queries in SQL (Structured Query Language) ...