The Cycad Pages
The DELTA System

The DELTA format (DEscription Language for TAxonomy) is a method for encoding taxonomic descriptions for computer processing. It has been adopted by the International Taxonomic Databases Working Group (TDWG) as a standard for data exchange. DELTA-format data can be used to produce natural-language descriptions, interactive or conventional keys, cladistic or phenetic classifications, and information-retrieval systems.

Species descriptions provided through the Cycad Pages have been generated using the DELTA system, and the multiple-entry identification tables provided also draw on the DELTA data files.

For more information on DELTA software and examples of datasets,

  • see the Biodiversity and Biological Collections Web Server.

    The Cycad Pages

    © 1998-2012 Royal Botanic Gardens Sydney
    Written and maintained by Ken Hill 1998-2010
    Maintained by Leonie Stanberg and Dennis Stevenson 2010-2012
    This site is currently not being maintained