A container for assumptions and metadata (dimensions, hierarchies, forms and reports, inter-model mappings, DTS packages that are used by PerformancePoint Server, and PerformancePoint Server data sources) that are global to any child model site of the root model site, or of a model site with which the library is associated. The assumptions and metadata of a shared library are for the exclusive consumption of these child models and are not available outside their immediate model family.