Manifold RDF data contain implicit references to geographic data. For example, music datasets such as Jamendo include references to locations of record labels, places where artists were born or have been, etc. The aim of the spatial mapping component, dubbed GeoLift, is to retrieve this information, make it explicit and integrate it into data sources according to the specifications of the user. To this end, GeoLift relies on a simple yet powerful workflow system that consists of two main components: modules and operators.
Modules 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. Operators work at a higher level of granularity and combine datasets. Thus, they take sets of datasets as input and return sets of datasets.
GeoLift implemented in Java as an open-source project. Please see /GeoLiftManual/GeoLiftManual.pdf for all the technical details