[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Re WF, V, and MSXML
Regading all the discussion about the RMD attribute and switching validation on and off and error recovery and so on.... The reason MSXML doesn't implement RMD yet is because there are problems with the RMD=IGNORE concept since ignoring the DTD can result in different data being given to the application - which generally is a bad thing. The spec says it is an error to specify RMD=IGNORE if the DTD contains any declarations of: 1) attributes with default values, if elements to which these attributes apply appear in the document instance without specifying values for these attributes, or 2) entities. (other than the built in entities), if references to those entities appear in the document instance, or 3) element types with element content, if white space occurs in the document instance directly within any instance of those types. The problem is that if the parser ignores the DTD, how can it detect #1 above ? Also, the white space handling can be ambiguous. So, MSXML currently takes the following approach: - RMD attribute is not implmented yet, so if a DTD is there it uses it. - If an error is found it stops. No error recovery is attempted. - If you don't want validation, remove the DTD. - It is ok to not define some of the elements in the DTD. This simply means that in the same document there is certain data that you want to guarantee to be correct, and other data that is more unknown in structure (but still well-formed). This is simply a side effect of being able to parse a document without a DTD. 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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