The Disease ontology can be downloaded using one of the following methods:
The OBO Foundry host a version of the Disease Ontology less than 24 hours out of date.
The latest and most up to date version of the Disease Ontology may be obtained from our Sourceforge site.
svn checkout https://diseaseontology.svn.sourceforge.net/svnroot/diseaseontology/trunk/ diseaseontology
Addtionally, the DO's HumanDO.obo file and HumanDO_xp.obo (logical definition format) may be downloaded using the Sourceforge web interface: