On Tue, 24 Oct 2006 18:26:37 +0200, MichaelB <[EMAIL PROTECTED]> wrote:
What is the use of this complex construct?: <!-- content model is %head.misc; combined with a single title and an optional base element in any order --> <!ELEMENT head (%head.misc;, ((title, %head.misc;, (base, %head.misc;)?) | (base, %head.misc;, (title, %head.misc;))))> Wouldn't this one be simpler? <!ELEMENT head (title|%head-misc;|base?)>
No, because it says something different. The first one says that a head consists of head.misc with exactly one title somewhere in it, and at most one base somewhere within it. Your simpler one says that the head is a title, or an optional base or head.misc.
Best wishes, Steven Pemberton
