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Subject: Re: [office] Re: [office-metadata] Suggested Changes on the Metadata proposal
I think you're reading too much into the IETF's definition of MAY. It explicitly says that a vendor is permitted to omit the item, though it must accommodate itself and degrade functionality as necessary. What is not permitted is that the application utterly crash when presented with an item it does not understand. At least that is the way it works for the IETF standards I'm familiar with.
Although intuitively we want to say, "Preserve metadata unless the user explicitly intended otherwise," I don't see how to express this in standards terms. We can't have a conformance depend on "user intent". And reference to a user doesn't help. Documents can be processed by automation, and I think we would equally be unhappy if metadata were arbitrarily stripped there. In any case, I think we need to work along the lines of "shall be capable of" or "shall allow at least one mode of operation where" or something like that. That would be testable.
[Definition: Conforming software MAY or MUST (depending on the modal verb in the sentence) behave as described; if it does, it MUST provide users a means to enable or disable the behavior described.]
You suggested that a devious implementation might makes this mode of operation hard to find in order to hurt interoperability. But then I could also suggest a devious user who arbitrarily deletes metadata in order to hurt interoperabiity. I'm not sure a document format standard can prevent either.
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