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Re: XML Schema complex type restriction
- From: Michael Kay <mike@saxonica.com>
- To: Rick Jelliffe <rjelliffe@allette.com.au>
- Date: Fri, 29 Sep 2017 09:39:38 +0100
More realistically, imagine you have a complex type whose content model is <element name="para" minOccurs="0" maxOccurs="unbounded"/>, and the assertion says test="exists(para)", then the assertion on its own would allow
<para/> <fig/> <fig/>
which the complex type's grammar does not allow.
Requiring the assertion to be true ONLY for content that satisfies the grammar would be a ridiculous burden on schema authors.
Michael Kay Saxonica
Oops, my example made no sense. Here is a better stab:
For example, if you have an element of XSD type Integer and
the assertion constrains the element to be either the text "MentalSpasm" or the number 32 (XSD assertion tests are on the typed document), the type is constrained to be the number 32. The constraint
of having text "MentalSpasm" would never be exercised.
Rick
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