Wordnet-lexical markup framework (LMF) is an instantiation of LMF for representing Wordnet-like semantic dictionaries. Wordnet is a widely accepted resource and thus provides a good case for testing the viability of a representation in LMF and the acceptance by a wide range of users. Wordnet-LMF was developed in the framework of the EU project KYOTO for the specific purpose of endowing a set of wordnets with a standardized interoperability format allowing the interchange of semantic information. This chapter explains the choices that were made to model the wordnet information in LMF. It provides a preliminary assessment of LMF, by large-scale application to real lexical resources, endowing wordnet with a format representation that allows easier integration among resources sharing the same structure and, more importantly, across resources with different theoretical and implementation approaches.