Model is a representation of the metadata structures(imported from the soure datawarehouse).A model contains organized metadata objects(organizing depends on business needs).After the completion of a model(obviously in a framework manager environment) it has to submitted to ReportNet server.There enterts the object called Package.A Package compresses(or includes) the developed meta data definitions and publishes (forwards) it to ReportNet server.Then the reportnet server moves it into a content store(repositiry) and now this repository acts as a source for report developers for generating various types of reports(list reports, cross tab reports etc etc.)