Re: SDD again
At 06:52 PM 5/8/98 -0700, alex@v... wrote: >No, it is not false. I hightlighted the word 'safe'. If you absolutely >*must* know that everything was read and interpreted correctly, you *must* >use a validating parser. There are many applications where this is not >an absolute requirement and, thus, you may use a well-formed parser. No. This claim is without technical merit and I cannot let it pass unchallenged. It is trivially possible to achieve correctness and 100% unquestioned reliability without the use of a validating processor. If you either (a) construct your DTD so that standalone='true' or (b) don't have external markup declarations, then you can have NO DOUBT WHATSOEVER that the document is being parsed correctly, for any sane denotation or connotation of "correctly". So please stop making this demonstrably false assertion. Not only is your premise false in theory, it is vacuous in practice. If you think, for any real-world application, that its validation against some DTD guarantees "correctness" in any nontrivial sense, then I don't want to go anywhere near your software. Validity is a highly specific claim, one which is of great utility in many applications, but it does not equate to having "safety" or "correctness". Equally, lack of validity does not equate to lacking "safety" or "correctness". >In addition, there are some applications that need some level of guarantee >about whether external declaration subsets will be read and honored. It is >this class of applications that we cannot address today with the current >definition of well-formed. This statement is correct, except for the unnecessary temporizing about "some level of guarantee". "Guarantee" is a binary condition; if you need a guarantee that the organization to which you are sending information will have external declarations read, then you need to specify the use of a validating processor at that end. If not, then not. But please don't equate this particular guarantee with general concepts of "safety" or "correctness" - doing so gives the impression that the use of documents which are merely well-formed is in some way sloppy or irresponsible; such a claim is fatuous and very, very, very unhelpful. -Tim Bray 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/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe 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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