[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Illegal Characters in Namespace URIs
Consider the following document: <root xmlns="[^^^^||||]"> ... </root> All of the characters used as values of the xmlns attribute are illegal in namespace URIs according to RFC 2396 and legal in XML attribute values. Is this document namespace well-formed? I've been hunting through the Namespaces spec and I can find no BNF grammar production or namespace constraint that indicates the value of an xmlns or xmlns:prefix attribute actually has to be a legal URI reference. They key seems to be section 6, which leaves out any restriction on namespace names as part of the definition of conformance. What have I missed? Where does the spec normatively require that the value of an xmlns attribute actually be a URI reference? If it does not so require, then I still wouldn't recommend that people use non-URIs as namespace names, but I might have to allow for that possibility in my software. There is one possible reason not to require the namespace names to be URI references: if any characters are allowed, then IRIs become possible as well. URIs only allow ASCII. -- +-----------------------+------------------------+-------------------+ | Elliotte Rusty Harold | elharo@m... | Writer/Programmer | +-----------------------+------------------------+-------------------+ | The XML Bible, 2nd Edition (Hungry Minds, 2001) | | http://www.cafeconleche.org/books/bible2/ | | http://www.amazon.com/exec/obidos/ISBN=0764547607/cafeaulaitA/ | +----------------------------------+---------------------------------+ | Read Cafe au Lait for Java News: http://www.cafeaulait.org/ | | Read Cafe con Leche for XML News: http://www.cafeconleche.org/ | +----------------------------------+---------------------------------+
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