Abstract: To meet the needs of creation of convergent se
rvice in NGN (next generation networking), an idea of introducing MDA (model dri
ven architecture) into the creation of services, based on delving into MDA, is p
roposed to supports not only modeling the services, but also reifying the models
. In addition, it demonstrates that UML (unified modeling language)an importan
t part in MDA, can describe the servicemodels exactly and comprehensive.

Key words: next generation networking, model driven architecture , unified modeling language, computational independent model, platform independe nt model, platform specific model