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  • To: xml-dev@l...
  • Subject: limiting occurrence of recursive elements in scemas?
  • From: Jon IV Thompson Coon <jon.thompson@h...>
  • Date: Sat, 25 Oct 2003 05:15:16 +0200
  • Sender: jthompso@m...
  • User-agent: Internet Messaging Program (IMP) 3.1

Spesifically the W3C schema.

that's a lot of hours of failed DIY before folding out and resorting to 
asking someone whom might have a clue what they are doing.

Simple problem (I assume): I need to allow unbounded occurrence of an 
element in the 'root' and following nested levels, but to only if it has 
not occurred in the same tree before.

For example I have a set of elements in the likes of <b/><i/><u/> and I 
want to allow 
<b><i><u>text<u></i></b> and <b><i>I am</><i>very tired</i><b>

but I do not (at all) want two same elements nested: 

<b><b></b></b> (can do) or <b><i><b>HOW?</b></i></b>

Ugly. What to do? I am at a loss. Spent hours with the specifications, but 
didn't quite know where to start and didn't even find out if it is 
possible. Should be quite a common requirement?

Thank you in advance.

By reading some of the archives I have come to the conclusion that what I 
require is not so easy?

- jon

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