• Publications
  • Influence
RQL: a declarative query language for RDF
Real-scale Semantic Web applications, such as Knowledge Portals and E-Marketplaces, require the management of large volumes of metadata, i.e., information describing the available Web content andExpand
  • 576
  • 73
  • PDF
Statistical Database
A statistical database is a database used for statistical analysis purposes. It is an OLAP (online analytical processing), instead of OLTP (online transaction. Whats new? Help us improve thisExpand
  • 363
  • 37
  • PDF
Ontology change: classification and survey
Ontologies play a key role in the advent of the Semantic Web. An important problem when dealing with ontologies is the modification of an existing ontology in response to a certain need for change.Expand
  • 309
  • 22
  • PDF
Inconsistencies, Negations and Changes in Ontologies
Ontology management and maintenance are considered cornerstone issues in current Semantic Web applications in which semantic integration and ontological reasoning play a fundamental role. The abilityExpand
  • 153
  • 21
  • PDF
The ICS-FORTH RDFSuite: Managing Voluminous RDF Description Bases
Metadata are widely used in order to fully exploit information resources available on corporate intranets or the Internet. The Resource Description Framework (RDF) aims at facilitating the creationExpand
  • 296
  • 17
  • PDF
Alleviating the Sparsity Problem of Collaborative Filtering Using Trust Inferences
Collaborative Filtering (CF), the prevalent recommendation approach, has been successfully used to identify users that can be characterized as “similar” according to their logged history of priorExpand
  • 264
  • 12
  • PDF
Semantic QoS Metric Matching
As the Web service paradigm gains popularity for its promise to transform the way business is conducted, the number of deployed Web services grows with a fast rate. While sophisticated semanticExpand
  • 146
  • 10
  • PDF
Requirements for QoS-Based Web Service Description and Discovery
The goal of service oriented architectures (SOAs) is to enable the creation of business applications through the automatic discovery and composition of independently developed and deployed (Web)Expand
  • 127
  • 9
Querying the Semantic Web with RQL
Real-scale Semantic Web applications, such as Knowledge Portals and E-Marketplaces, require the management of voluminous repositories of resource metadata. The Resource Description Framework (RDF)Expand
  • 86
  • 9
  • PDF
Incremental Collaborative Filtering for Highly-Scalable Recommendation Algorithms
Most recommendation systems employ variations of Collaborative Filtering (CF) for formulating suggestions of items relevant to users' interests. However, CF requires expensive computations that growExpand
  • 107
  • 7
  • PDF