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I think there's another important piece here, which is defining an entire vocabulary; a little mini-language, so you could have the concepts of validity, and some meta-document (dtd, schema, what have you) for defining the tags within that vocabulary. You can't do that if you just say, let tags appear wherever. The root element (along w/DOCTYPE) seems to have acted as a label for that. That method for identifying a vocabulary is definitely an historic artifact, but you'd have to have *some* mechanism for it that would be sort-of global to a document. -Mike On 01/20/2012 07:14 AM, Michael Hopwood wrote: >>>> What I'm trying to get at is the fundamental rational between what appears to be two extremes not necessarily compatible, and why we ended up with only the later. >>>> > Actually, and for a very long time before it became "cool" ;) to talk about this, it's really only been the latter, except that the "markup" for the rest of the document is implicit. Adding a "root" tag for the whole document simply formalises and makes machine-readable (although you could have done this a variety of other ways, like filename extensions) what "documentalists" of all kinds have been doing for a very long time; (more or less formally) identifying integral units of documentation. > > A MARC21 serialisation has message headers to separate different catalogue records in the stream - those are short documents, generally, although they can potentially get very long. And every element, as well as the whole thing, is marked up. > > _______________________________________________________________________ > > XML-DEV is a publicly archived, unmoderated list hosted by OASIS > to support XML implementation and development. To minimize > spam in the archives, you must subscribe before posting. > > [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ > Or unsubscribe: xml-dev-unsubscribe@l... > subscribe: xml-dev-subscribe@l... > List archive: http://lists.xml.org/archives/xml-dev/ > List Guidelines: http://www.oasis-open.org/maillists/guidelines.php > >
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