Validating Entities (was Re: XML Torture Test: Parsers Fail)
Richard L. Goerwitz writes: > All the spec says is that validity depends on entities matching > certain productions in the grammar. No, XML 1.0 says that *well-formedness* depends on entities matching certain productions in the grammar. The spec contains no concept of validity for individual entities. Here's what it does say: (from 2.1 Well-Formed XML Documents) A textual object is a well-formed XML document if: 1.Taken as a whole, it matches the production labeled document. 2.It meets all the well-formedness constraints given in this specification. 3.Each of the parsed entities which is referenced directly or indirectly within the document is well-formed. (from 2.8 Prolog and Document Type Declaration) An XML document is valid if it has an associated document type declaration and if the document complies with the constraints expressed in it. (from 4. Physical Structures) An XML document may consist of one or many storage units. These are called entities; they all have content and are all (except for the document entity, see below, and the external DTD subset) identified by name. Each XML document has one entity called the document entity, which serves as the starting point for the XML processor and may contain the whole document. I don't think that there's much room for ambiguity here: 2.1 defines what a well-formed document is, 2.8 further defines clearly what it means for a well-formed document to be valid, and 4 makes it clear that multiple entities still count as a single document. All the best, David -- David Megginson david@m... http://www.megginson.com/ 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 (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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