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Subject: Re: DOCBOOK: curious about duplicated elements
On Sun, Aug 11, 2002 at 04:09:25PM +0200, Steffen Maier wrote: > On Mon, 5 Aug 2002, Robert P. J. Day wrote: > > as i peruse all of the elements, i was curious about the fact that > > a <book> can directly contain a <title> element, but a <book> can also > > contain a <bookinfo> element, which itself can contain a <title>. > > > > this kind of duplication seems to be fairly rare -- a <book> can't > > directly contain, for example, an <authorgroup>; that has to be > > within the <bookinfo> element. any reason why title, subtitle > > and titleabbrev have this extra flexibility? > > I think this comes from the distinction of meta data (title inside *info, > e.g. bookinfo) and non-meta data (e.g. title inside book) where the > former is usually not represented in any form in printed output (therefore > meta data) and the latter makes up material to be printed in the output > format. Well, much of the metadata in bookinfo is printed, on the title page. That's where the author information goes, for example. In general, metadata is information *about* the book, rather than part of the book's subject content. I think title came first, and bookinfo was added later as a way to collect the little bits of metadata that were building up as DocBook evolved. It is possible to have a title in both places, but the stylesheet 'policy' in XSL is to use bookinfo/title if that is available, otherwise use title. -- Bob Stayton 400 Encinal Street Publications Architect Santa Cruz, CA 95060 Technical Publications voice: (831) 427-7796 Caldera International, Inc. fax: (831) 429-1887 email: bobs@caldera.com
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