A write up of the proposal, which we are prototyping in Daffodil, is here: https://opensource.ncsa.illinois.edu/confluence/display/DFDL/Enumerations+an... This is needed by a number of data formats we are working with where there are large enumerations having as many as 2000 members. Often these enumerations are a mixture where single values correspond to some enumerated strings, and ranges of values correspond to others. Using expressions to translate representation integers into strings is infeasible, as no constant-time case-statement-like construct is available in DFDL. Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy <http://www.ogf.org/About/abt_policies.php>