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   Quantity constraints

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  • To: xml-dev@lists.xml.org
  • Subject: Quantity constraints
  • From: Xasima Xirohata <xasima@gmail.com>
  • Date: Fri, 11 Nov 2005 11:59:57 +0200
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 I wonder if there exists a way to make a constraints on the total
count of sub elements (or sub element of the certain type) of the
given type using XSchema.

For example I mean to produce the constraints looks like:
A shop pretended to be marked "Sweetly Trader" MUST has not less than
73 different names of products (e.g. different names of cakes and so
on) in assortment. It MUST have at least 10 instance (e.g. "Royal#1
Cakes",.., "Royal#9 Cakes", "Big Cakes" ) of each type from the list
ice cream type, confetti type, cakes type. If it has more than 15
different ice-creams it might be called "Sweetly Ice-cream Trader".

How to
1)	Explicitly produce this requirement using schemas.
2)	Classify what kind of *Trader the shop (described in emailed myshop
xml) is. You see that this constraint based on counters, not on

element IWonnaBeSweetlyTrader {
   element ice-cream {
attribute name { text },
   element confetti {
     attribute name { text },
   } +

   element cakes {
     attribute name { text },
   } +

I guess that schematron seems to be good solver for this question, but
is there anything else?

          ~ Xasima Xirohata ~


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