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?)> Greatings from Germany, Michael
