The concept of UFIS, an information system on ecological models, is pr
esented. Its goal is to support worldwide interchange of models and mo
delling know-how. A standardized model documentation scheme has been d
eveloped which will serve as the basis of UFIS. The particulars of a m
odel documentation within UFIS include general information, mathematic
al formulations and technical requirements. Data questions are also de
alt with. UFIS will be accessible via worldwide computer networks and
allow online retrievals.