Data Core data true Core data entities typically have a format and may be identified by an accession number. beta13 A type of data that (typically) corresponds to entries from the primary biological databases and which is (typically) the primary input or output of a tool, i.e. the data the tool processes or generates, as distinct from metadata and identifiers which describe and identify such core data, parameters that control the behaviour of tools, reports of derivative data generated by tools and annotation. 1.5