Enrichment functions and operators.
Enrichment functions implement functionality for processing the content of a dataset (e.g., applying named entity recognition to a particular property). Thus, they take a dataset as input and return a dataset as output. Enrichment operators work at a higher level of granularity and combine datasets. Thus, they take sets of datasets as input and return sets of datasets.
RDF specification paradigm
In the current version of DEER we introduce our new RDF based specification paradigm. The main idea behind this new paradigm is to enable the processing execution of specifications in an efficient way. To this end, we first decided to use RDF as language for the specification. This has the main advantage of allowing for creating specification repositories which can be queried easily with the aim of retrieving accurate specifications for the use cases at hand. Moreover, extensions of the specification language do not require a change of the specification language due to the intrinsic extensibility of ontologies. The third reason for choosing RDF as language for specifications is that we can easily check the specification for correctness by using a reasoner, as the specification ontology allows for specifying the restrictions that specifications must abide by.