Cart
[Home] [By Thread] [By Date] [Recent Entries]
> I have few elements in a DTD and I want to explicity declare one as > the root to be used in XML, not the others, is there a way for that ? No. This is done in the document's document type declaration, not in the DTD. In a document type declaration like this, <!DOCTYPE chapter SYSTEM "docbook.dtd"> the whole point of the "chapter" part is to identify which of the element types declared in the specified DTD should be used as the root element (also known as the "document element"--the element to be used to enclose the whole document). I believe the highest level element in DocBook is set, but I find it hard to imagine someone creating a document to represent a set of books. We are free to use set, book, chapter, article, or even para as the document element for a valid DocBook document. This is a Good Thing, because it adds flexibility to how the DTD is used. It's the reason that XML (and SGML) have lent themselves so well to electronic publishing systems in which different elements were mixed and matched to create different documents all conforming to the same DTD. I've seen schema proposals that let you specify which of a schema's element types could be a document's root element, but after a quick look at section 3.3 of Part 1 of the W3C Schema Rec (http://www.w3.org/TR/xmlschema-1/#cElement_Declarations) and the RELAX NG schema for RELAX, I don't believe that either of these let you do this. I could be wrong. Bob DuCharme www.snee.com/bob <bob@ snee.com> see http://www.snee.com/bob/xsltquickly for info on new book "XSLT Quickly" from Manning Publications.
|
