The notation "Behavior, Unspecific" is confusing, since section 2 clearly state that compliance is syntactic, so no behaviour is required, or are all behaviour unspecified

Clarify the definition to state if this is regarding behaviour, for which the specification have no recommendation.

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Proposed Disposition of DIS 29500 Comment DK-0069 (Modified: 2008-01-04) Agreed; we will update Part 1 Definitions as follows: behavior, unspecified –Behavior where this Standard imposes no requirements makes no recommendations . [Note: To add an extension, an implementer must use the extensibility mechanisms described by this Standard rather than trying to do so by giving meaning to otherwise unspecified behavior. end note] Similar Comments: FR-0006 , GB-0031 , JP-0025 , KE-0076 , PT-0024 , US-0259