Towards Policy-aware Queries over Linked Data

The Linked Data principles for publishing data on the Web enable the distributed evaluation of queries, where data sources are discovered during runtime. Data sources can have associated licenses that restrict allowed usages. Besides restrictions on the access to the data sources, the usage terms can also restrict the usage terms which can be assigned to derived data artefacts, e.g. query results depending on a data source. We propose to formalise such usage restrictions, in order to automate compliance checks, when query results are used or republished for a specific purpose. This work demonstrates a practical application of a suitable policy formalism published at this conference [1].