Keywords, restricted vocabularies (RVs), thesauri, and catalogues are introduced leading up to discussion of the need for full ontologies to describe the full logical and relational structure of e-information-objects (e-IOs) (data or docs). A re-ordered and (re-) structured NEFIS RV for forest inventory and mensuration (FIM) is (re-) presented, leading on to the description of new outline ontology for FIM. The fundamental problem of data incompatibility forest information systems is (re-) stated and the need for a forest standards conversion toolkit is (FSCTK) highlighted. FIM ontologies aid not only in the discovery of e-IOs on the WWW, but help to guide the analytical use of the FSCTK, possibly as a Web-service from the forest model archive (FMA).