292   Explanation of r and w

This tissue has following status: green

Created: 14 Feb 2006


Page: 18

Clause: 4


Category: Issue for edition 2 of this part

Issue: Clarify the characteristics of "r" and "w"

Proposal: "r" means readable, but not necessarly read only
"w" means writeable, but not necessarly write only

Discussion Created Status
Ballot until Editor
31 Mar 06 green
changed to final proposal 24 Feb 06 final proposal 24-03-2006
The definitions of "r" and "w" can be found in clause 4. These will be clarified. Additionally, add "rw" definition.

"r = mandates that the item is readable. The ability to write the item is a local issue."

"rw"= Mandates that the item is both readable and writeable."

"w = Mandates that the item is writeable. The ability to read the item is a local issue."

16 Feb 06 red
The proposal does not consider different usages, i.e. the scope is not clear. The proposal's meaning is acceptable as a requirement from the standard, e.g.: "r" means, the considered data/attribute shall be readable, it may additionally be writeable.
In the context of a description of an implementation however, a 'may perhaps' is not allowed. Here an "r" means readable and nothing else, and if it is also writeable, then a "w" must be added additionally. This means that a standard formalism working with 'but may also' can not be used to describe an implementation (instance) of the standard.
16 Feb 06 red


Privacy | Contact | Disclaimer