The date on which the subject was identified as representing the Taxon. Recommended best practice is to use an encoding scheme, such as ISO 8601:2004(E).
One of the greatest reasons to capture specimen data and make it accessible is to facilitate/encourage determinations. Here, we are using determination as a more general concept which encompasses identifications, type status, publication, etc. (i.e., anything that can be determined about a specimen). It is generally accepted that capturing some or all determinations on a specimen has value beyond the common practice of only capturing the label name and the most recent identification. Thus, we are recommending an identification extension to allow these valuable relationships to be captured. Please note that we do not consider typification information to be an identification as is suggested by the inclusion of a "typeStatus" in the GBIF extension cited below. Type information in DwC is associated with the specimen and the recommendation for its use is found here:typeStatus
Identification extension: http://rs.gbif.org/extension/dwc/identification.xml
Recommended authority file: Harvard Index of Botanists database: HUH Index of botanists at: http://kiki.huh.harvard.edu/databases/botanist_index.html
LINKS TO RESOURCES, PERHAPS WITH EXPLANATION