Official documents for the Touchstone File Format Specification are listed below. Touchstone version 2.1 was ratified in a vote of the IBIS Open Forum membership during the January 26, 2024 IBIS Open Forum teleconference.

Comments may be addressed to the IBIS email list (if subscribed), or to the IBIS Open Forum Chair. Formal change requests for consideration in the next IBIS-ISS specification version can be made by submitting a TSIRD (Touchstone Issue Resolution Document).