sentences:  Adherence to these guidelines also facilitates the sharing of software and service infrastructures built upon modeling activities.The idea of "a set of good practices" including "some obligatory metadata" was first proposed by Nicolas Le Novère in October 2004 as part of a discussion to develop a common database of models in systems biology (which led to the creation of BioModels Database).These initial ideas were further refined at a meeting in Heidelberg, during ICSB 2004, with representatives from many other interested groups.