The External Representation of Block Designs

These documents together with the related supporting files should be of interest to those working in combinatorial or statistical design theory, as well as those interested in the development of standard electronic formats for mathematical objects.

JSON Based Specifications

The new Searchable Design Database uses the JSON based specification. The rationale for switching from XML to JSON and the implementation details of the database is described in designdb-1.0.pdf.

XML Based Specifications

The downloadable XML files in the Database section are in version 2.0 format. The difference between 1.1 and 2.0 is just a minor structural change. So the semantical definitions of components described in the documentation for version 1.1 are still valid.

Please send comments, questions, bug reports to extrep@designtheory.org

Last Updated: 2009-05-27