Release 1.5 provides the modified definition only. There are several reasons why OSF classifies guidelines as trial use instead of full use. A guideline may be under consideration for inclusion in a de jure standard and so may possibly change as a result of the standards process. Or, OSF may perceive that the guideline is new compared to other included guidelines and, therefore, the implementation and use of the guideline may suggest revisions in its definition. In the preceding example, if the guideline to be modified were a trial-use guideline, Release 1.3 would include the unmodified definition with a warning and description of the change, and Release 1.4 would include the modified definition only.
Most existing guidelines retain their support level from the previous revision.
A review level leading to level -use inclusion on acceptance, and no change in status otherwise. This status may be used to propose a new guideline for level -use, or to move an existing guideline to a higher status. If the proposal is rejected, the guideline remains as is. A review level for guidelines of any support level in which OSF wishes to correct a specification error. Guidelines proposed for correction return to their original status, in corrected form, on acceptance of the correction.