``obogaf::parser`` is a Perl5 module to parse *obo* (Open Biological and Biomedical Ontology) and *gaf* (Gene Annotation File) file. The ``obogaf::parser`` reference manual is available at following [link](https://metacpan.org/pod/obogaf::parser) or locally by typing ``perldoc obogaf::parser`` (after installing the module). A comprehensive tutorial showing how to install and how to apply ``obogaf::parser`` to real bio-medical case studies is available at the following [link](https://github.com/marconotaro/obogaf-parser/blob/master/readme.md).