This standard defines the taxonomic and nomenclatural concepts associated with the names of plants. It describes the component parts, their functions and their interrelations of significance in structuring a database. The appendices provide an outline of a preliminary data dictionary illustrating possible elements and their properties. It does not provide a data model or a data format. A data model will be considered at a later date by the TDWG Sub-group considering this standard. While this standard is still in use, it is no longer actively maintained (labelled as prior on the TDWG website).