[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Too much latitude in Nmtoken characters?
Eric Baatz - Sun Microsystems Labs BOS wrote: > > I don't understand why such a wide choice of characters are allowed in > in the June XML Syntax specification. > > [7] Nmtoken ::= (NameChar)+ > > Because > > [4] NameChar ::= Letter | Digit | MiscName > [3] MiscName ::= '.' | '-' | '_' | ':' | CombiningChar | Ignorable | Extender > [87] Ignorable ::= a whole bunch of characters like "zero width non-joiner", > "right-to-left mark", and "zero width no-break space" > > This seems to allow Nmtokens that aren't visible to the human eye, > for example, consisting of a single zero width non-joiner. > Plus, what if one is embedded in a token? You could have two different tokens that appear to be identical to the human eye, one of which could split into two parts in the right context. > My limited understanding of SGML suggests that a Nmtoken is more like > a Name rather than a superset of it. For that matter, is "9" a sensible > Nmtoken? > I think "9" is a legitimate Nmtoken (in the Ref. Concrete Syntax, anyway), because Nmtokens aren't limited in their first character the way Names are - the first character can be anything which can appear in the rest of the token. -- ================================ Mark Brissenden Glosa International http://www.csn.net/~brissen ================================ xml-dev: A list for W3C XML Developers Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To unsubscribe, send to majordomo@i... the following message; unsubscribe xml-dev List coordinator, Henry Rzepa (rzepa@i...)
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