| Paper | problem(s) | Subproblem(s) | motivation | related Problem(s) | Framework | Challenges |
|---|
| A Semantic Web Middleware for Virtual Data Integration on the Web | SPARQL Query Federation | | {{{Motivation}}} | | SemWIQ | {{{Challenges}}} |
| ANAPSID: An Adaptive Query Processing Engine for SPARQL Endpoints | SPARQL Query Federation | Query processing on Linked Data | distrinution of RDF datastores | Decompose queries into sub-queries that can be executed by the selected endpoints | ANAPSID | Query Decomposition, Query Optimization, and Query adaptation. |
| Adaptive Integration of Distributed Semantic Web Data | SPARQL Query Federation | No data available now. | No data available now. | No data available now. | ADERIS | No data available now. |
| Avalanche: Putting the Spirit of the Web back into Semantic Web Querying | SPARQL Query Federation | | flexibility of Web of Data is paramount for future development of the Semantic Web – as it was for the WWW | | Avalanche | the exponential complexity class of the plan composition space. |
| FedX: Optimization Techniques for Federated Query Processing on Linked Data | SPARQL Query Federation | Federated RDF query processing | The lack of a global schema, querying data from multiple sources could be solved by querying distributed datasets | Find optimization techniques that allow for efficient SPARQL query processing on federated Linked Data | FedX | {{{Challenges}}} |
| Optimizing SPARQL Queries over Disparate RDF Data Sources through Distributed Semi-joins | SPARQL Query Federation | No data available now. | No data available now. | No data available now. | Distributed SPARQL | No data available now. |
| Querying Distributed RDF Data Sources with SPARQL | SPARQL Query Federation | Querying Distributed RDF Data Sources | {{{Motivation}}} | Transparent query federation | DARQ | {{{Challenges}}} |
| Querying the Web of Data with Graph Theory-based Techniques | SPARQL Query Federation | Querying Distributed RDF Data Sources | No data available now. | Transparent query federation | GDS | {{{Challenges}}} |
| Querying the Web of Interlinked Datasets using VOID Descriptions | SPARQL Query Federation | Query processing on Linked Data | No data available now. | Missing results and large document retrieval. | WoDQA | {{{Challenges}}} |
| SPLENDID: SPARQL Endpoint Federation Exploiting VOID Descriptions | SPARQL Query Federation | Querying Distributed RDF Data Sources | {{{Motivation}}} | Retrieve and join the result tuples | SPLENDID | {{{Challenges}}} |
