EDTF in RDF/OWL

This repository is for discussion and development of standards, best practices, and tools for using Extended Date/Time Format (EDTF) in RDF and OWL.

Currently it contains:

• A draft ontology extending the Time Ontology to model EDTF concepts

• A set of Turtle files using this ontology to model the different examples from the EDTF specification for EDTF level 0, level 1, and level 2.

• Notation3 rules for automatically inferring Time Ontology constructs from EDTF strings

Initially we just hope to reach consensus on how EDTF maps onto the Time Ontology.

Future work may include:

• Standards for linking datatypes to rules for expanding them into subgraphs, so that non-EDTF aware tools can process EDTF (see David Booth's speculation about “rich literals”)

• Mapping to other temporal ontologies such as CIDOC-CRM

See the discussions for more.