NOTE 1 Lexicons are resources for comprising lexical entries for a given language
NOTE 2 Meronomies are type of hierarchies which deals with part-whole relationships
NOTE 3 Ontologies are formal, explicit specification of a shared conceptualizationIt enables classification systems, information models, object models, data templates and process models to be cross-referenced from within a common framework.
BSI recommends this version of standard for organisations operating in or with the UK. The ISO edition is available here if required.