Semantic Web is challenged by the URI meaning issues arising from putting ontologies in open and distributed environments. As a try to clarify some of the meaning issues, this paper proposes a new approach to interpreting distributed ontologies, it's built on the top of local models semantics, and extends it to deal with the URI sharing by harmonizing the local models via agreement on vocabulary provenance. The commitment relationship is presented to allow the URI sharing between ontologies with richer semantics. Categories and Subject Descriptors I.2.4 [Knowledge Representation Formalisms and Methods]: Representation languages. General Terms Languages, Standardization, Theory. Keywords OWL, Distributed Description Logic, Vocabulary Provenance, Commitment Relationship.