A “cross-map” will enable the relationships between lists of species and other taxa in one species information system to be related to those in another species information system. This is a fundamental element of making it possible to perform data aggregation and complex analyses which require the use of data from multiple, diverse species information systems.
The primary relationships to be maintained in a cross-map are relationships between the taxa, and not between the individual names. This means that, given a scientific name, the taxon that it is associated with can be determined in one taxonomy, and the corresponding taxon/taxa in another can be provided by the cross-map. The cross-map is therefore fundamentally a mapping between suitable immutable taxon identifiers in the various taxonomies.