Re: Separating documents in a stream
[Richard Anderson] >Provided the xml pi is _always_ used that can be used as the separator and >seems the cleanest approach to me. ... except the XML *declaration* can appear in a document other than at the beginning: <![CDATA[<?xml version="1.0"?>]]> while the other suggested hacks (^L, ]]>]]>) are always illegal anywhere within an XML document. >The XML declaration is an indication to the application processing the >document as to what version of the XML spec the following markup conforms >to, what encoding is used, and whether or not there are dependancies of >external entites within the document. All of those are processing hints >(read PI) for the XML processor, arent they ? Except "PI" is a well- and clearly-defined term, and it does not mean "processing hint". Careful terminology is important when discussing defined standards. >Now, it you can tell me that the XML decl doesn't meet the definition of a >processing instruction as defined by section 2.6 of the spec I'll change my >mind. That would be §2.6, productions  and :  PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'  PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l')) The string '<?xml ...?>' does not match PI because 'xml' does not match PITarget. >To me, the XML declartion is simply a PI that has a special meaning. >Certainly the SAX parser I use reports the XML declaration as a PI which is >obviously very usual. Is that unusual ? I hope it is - that parser is broken. >I will argue the XML spec doesn't define the declaration as a type of PI, >but it does reserve the xml PItarget, and, quickly checking the nearest XML >book on my desk (XML companion by Neil Bradley) that also says it is a PI. That book is broken too. That's one reason why careful use of terminology is important - you may know what you meant, but in a public forum, others will learn from what you say, and they may not know what you meant (though they think they do). The prose language is §2.6 is a little ambiguous, noting that "XML", "xml", and so on are reserved for standardization. However, the grammar for PITarget explicitly forbids them; compare §2.3, where Names beginning with xml are reserved, but the grammar permits them. -Chris -- Christopher R. Maden, Solutions Architect Exemplary Technologies One Embarcadero Center, Ste. 2405 San Francisco, CA 94111 xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To unsubscribe, mailto:majordomo@i... the following message; unsubscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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