This Recommendation defines the common interchange format (SDL-CIF) for specifications written in Specification and Description Language. It is intended for tool vendors as an export and import format to allow the interchange of specifications with tools offered by other tool vendors. Even though the format allows writing specifications in SDL-CIF directly, it is not intended for this purpose, but rather should be generated from an existing specification written according to the Specification and Description Language as defined in [ITU-T Z.100], [ITU-T Z.101], [ITU-T Z.102], [ITU-T Z.103], [ITU-T Z.104] and [ITU-T Z.105].