2517 OBO Flat File Format 1.2 Text (Structured) OBO Flat File Format version 1.2 files are text files generated by the software OBO-Edit, an open source application for editing and viewing ontologies, which is no longer being updated. The OBO flat file format is an ontology representation language, enabling the user to model concepts that are not supported in other description logic languages. 1 Digital Preservation Department / The National Archives 09 May 2022 09 May 2022 fmt/1681 PUID obo File extension 2014 OBO Flat File Format BOF Absolute from beginning of file, magic bytes: format-version: 1.2 1 Absolute from BOF 0 0 666F726D61742D76657273696F6E3A20312E32