When you use psi-ms.obo, please cite the following publication:
Mayer G, Montecchi-Palazzi L, Ovelleiro D, Jones AR, Binz PA, Deutsch EW, Chambers M, Kallhardt M, Levander F, Shofstahl J, Orchard S, Vizcaíno JA, Hermjakob H, Stephan C, Meyer HE, Eisenacher M; HUPO-PSI Group. The HUPO proteomics standards initiative- mass spectrometry controlled vocabulary. Database (Oxford). 2013 Mar 12;2013:bat009. doi: 10.1093/database/bat009. Print 2013. pdf
Anyone can request a new term be added to the controlled vocabulary by opening an issue or a pull request against this repository. We'd appreciate any help you can contribute when submitting a new term, from proposing the term name and description to defining its relationships and properties. Submitting the request already formatted as an OBO term is helpful too! Don't worry about finding an unused id string, that can be handled near the end.
If you're requesting multiple related terms, you can submit them in a single issue/pull request.