NLP Interchange Format (NIF): an RDF/OWL-based format that allows to combine and chain several NLP tools in a flexible, light-weight way

The core of NIF consists of a vocabulary, which can represent Strings as RDF resources. A special URI Design is used to pinpoint annotations to a part of a document. These URIs can then be used to attach arbitrary annotations to the respective character sequence. Based on these URIs, annotations can be interchanged between different NLP tools.