Re: Re: URIs, concrete (was Re: Un-ask thequestion)
Greetings, On Thu, 1 Aug 2002, Joe English wrote: > David Carlisle wrote: > > in other words the phrase "global attribute" and "attribute in a > > namespace" currently mean the same thing. which is why several people > > have commented that unless you furher qualify something, a change that > > puts unprefixed attributes into the namespace of their elements > > will make them global attributes. > > That's entirely true. However, after re-re-reading [XMLNS] > A.1 "The Insufficiency of the Traditional Namespace" and > A.2 "XML Namespace Partitions" several times, I'm coming > to the conclusion that this entire section is essentially > meaningless. At most, it indicates a "Best Common Practice." Hear, hear. Appendix A has _never_ made any sense, and appears as nothing more than a hobby-horse that someone has managed to back into the spec. It doesn't even indicate best-practice, since all it says is that "`global attributes' are proctological ones (to use Joe's term): they are commonly observed to occur in a variety of applications". There are no deductions you can make about the behaviour or semantics of `global attributes' based on the text of this appendix. In particular, I do not believe you can deduce (as David wants to do) that a `global attribute' is valid on any element in the same namespace. The spec says nothing about which attributes are valid where. The term `global attribute' adds nothing, and thus the worry about whether something is a `global attribute' or not appears not to matter. An attribute is in a namespace or it isn't; if it is then it's subject to generic namespace processing; if it's not, it isn't. The only question that matters is: What is the rule for determining the namespace of an attribute? The spec's rule is an evasive one; Simon's edit does not affect the rule, but consists of suggested behaviour for applications; the whole problem would largely disappear if default namespaces disappeared. (is that correct?) All the best, Norman -- --------------------------------------------------------------------------- Norman Gray http://www.astro.gla.ac.uk/users/norman/ Physics and Astronomy, University of Glasgow, UK norman@a...
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