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Re: Constrain the Number of Occurrences of Elements inyour XML

• To: 'XML Developers List' <xml-dev@l...>
• Subject: Re: Constrain the Number of Occurrences of Elements inyour XML Schema
• From: "Thomas B. Passin" <tpassin@c...>
• Date: Mon, 08 Aug 2005 09:26:57 -0400
• In-reply-to: <009401c59bf0$cd19e5d0$a300a8c0@RW>
• References: <200508051752.j75HqUx15963@s...> <009401c59bf0$cd19e5d0$a300a8c0@RW>
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Pete Cordell wrote:
> Someone mentioned the word 'combinatorial', but I couldn't find the 
> e-mail it related to.  In case it refers to a different combinatorial to 
> the one I'm thinking of,...

That was me ...

> the problem I've encountered with fixing limits is when multiple nested 
> structures have non-unity cardinality.  For example, a book may have a 
> number of volumes, which have a number of chapters, that have a number 
> of sections, that have a number of sub-sections, that have a number of 
> paragraphs, and which have a limit on the maximum number of characters 
> in a paragraph (e.g. a string constraint).
> 
> If you assign a reasonable number to each level, by the time you 
> multiply it all out, you get a huge number that probably doesn't help 
> you.  If you try to limit the maximum size to something useful, your 
> 'local' limits end up too small to be useful.

You've given a very nice example of the kind of thing I was thinking about.

Tom P

• References:
  • Constrain the Number of Occurrences of Elements in your XML Schema
    • From: "Roger L. Costello" <costello@m...>
  • Re: Constrain the Number of Occurrences of Elements in your XML Schema
    • From: "Pete Cordell" <petexmldev@t...>

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