The following describes the convention for recently revised schemas. Older versions use varying conventions. Normally, this is just the major version since minor versions are upwardly compatible by definition. Pre-release schemas always have a version number starting with 0. Drafts of previously released schemas will have a letter following the current major version.
Samples normally have just the schema name with a .xml extension.
These will be corrections to previous versions or adding optional information. Please note that sample messages are just samples. Messages between client and Gateway may have different header content. Refer to the schemas and any supporting documents for the definitive definitions. Final validation of samples can only occur once the schemas are hosted on the official GovTalk web site.