15. A method for using a meta-data library to manage life-cycles of network models comprising: receiving at least changes associated with one or more telecommunication models; comparing the received changes to one or more stored telecommunication models; identifying portions of the compared one or more stored telecommunication models affected by the received changes; generating a version of each stored model affected by the received changes; and forwarding a version of one or more models to a mediation unit to enable the generation of one or more normalized models.
18. The method as in claim 15 wherein the one or more stored models comprise previous versions of models selected from at least the group consisting of one or more network element models, one or more operations support models, one or more transformation models and one or more meta-meta data models.