Psi-mi xml
From BITS wiki
Source: http://www.psidev.info/index.php?q=node/60.
PSI-MI stands for 'Proteomics Standards Initiative Molecular interactions' and is a data exchange format for molecular interactions. It is a XML type of format.
Subdirectories are
doc/ Auto-generated documentation of the PSI MI XML schema src/ Source code for schema and related software data/ Controlled vocabularies tools/ Data management tools