The case of lexical data as presented in a dictionary offers an interesting experimental setting for studying interoperability in the context of standardisation. It is complex enough to reflect the variability which is intrinsic to the TEI Guidelines while providing a limited observational setting for studying the granular structure of lexical entries as well as the rather high internal coherence that one specific lexical source usually has. Lexical resources also reflect the variety of analytical points of view that one may have on linguistic information ranging from quite descriptive and verbose objects in the domain of standard human-oriented dictionaries to fully structured databases like developed in the natural language processing domain.