A-Spec Proposed Changes

A-SPEC Proposed Changes







New versions of D-Spec, R-Spec, O-Spec, B-Spec, S-Spec and W-Spec and the companion document A-SPEC, are now available to A-SPEC members for download. These versions became the applicable versions from 31 May 2019.

Please note that we have provided a Change Log indicating the changes applied for the new release of each specification. This can be downloaded here.


Download the current A-SPEC Requirements Document Version 2.0.5 Final here

Download the current A-SPEC Codelist Version 1.0.5 here


Download the current B-Spec Specification Version 2.0.5 Final here

Download the current D-Spec Specification Version 9.0.5 Final here

Download the current O-Spec Specification Version 3.0.5 Final here

Download the current R-Spec Specification Version 3.0.5 Final here

Download the current S-Spec Specification Version 2.0.5 Final here

Download the current W-Spec Specification Version 2.0.5 Final here


A-SPEC is regularly updated to meet the A-SPEC Community changing needs. Changes may be driven by the introduction of new technology and or emerging A-SPEC Community expectations.

Changes are initiated by suggestions from the A-SPEC Community and through research undertaken by GISSA.

No changes are introduced into the A-SPEC Specifications without full consultation with the A-SPEC Community. A-SPEC Community members will be contacted directly for comment on proposed changes.

Contact us for information relating to proposed changes to any of the specifications.