The concept of the INTERLIS model repository is to make data models available as http-resources. Thus, INTERLIS model files are stored on a web server and can be used e.g. by the FME-Plugin «ili2fme» directly. The advantage for the user lies in the fact that the model file and potentially other imported data model don't need to be stored locally.
The model repository is structured in a hierarchical way. The access point is http://models.interlis.ch
The two most important sub-repositories is on the one hand the federal repository http://models.geo.admin.ch, which contains the minimal geodata models for the official geodata sets under federal legislation, on the other hand, the CCGEO (Conference of State Centers for Geoinformation) repository http://models.kkgeo.ch with further sub-repositories for individual cantons.