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Answer (Roger Carney, GoDaddy and former T/T PDP WG member): I think the intent was “whatever is needed” for identification.
Answer (w/ name and affiliation):James Galvin, Afilias, T/T PDP WG member, IRD Expert WG Chair): I do not recall specifically how "/" was read out during discussions. Nonetheless, I know from a technical perspective the answer has to be "and". In the general case, it simply is not possible to ensure transformation from one form to another and back to the original without loss of information if both a language and a script tag are not present. It is true that in the majority of cases if only one is specified the other can be inferred, but greater success is present when this is done manually than when this is not programmatically.
Answer (w/ name and affiliation):
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