CODEWITHSUNDEEP
xmlxsdattributes
FordPrefect
FordPrefect

Reputation: 406

XSD with dynamic pattern value with dynamic quantifier

I want to define an XSD which has a sequence of elements each representing a comma seperated list of values, with some restrictions. The element definition looks in principle like this:

<xs:element name="line">
    <xs:simpleType>
    <xs:restriction base="xs:string">
      <xs:pattern value="-?[0-9]*.[0-9]{1,2}(,-?[0-9]*.[0-9]{1,2})*"/>
    </xs:restriction>
  </xs:simpleType>
</xs:element>

This works fine, beside one issue that the generic quantifier * will allow for undefined number of elements.

I have in another element of the xml tree an integer that specifies how many entries are needed. I would like to use an <xs:assert test="..."/> statement at the top level of my XSD to have a similar functionality like the <xs:pattern value="-?[0-9]*.[0-9]{1,2}(,-?[0-9]*.[0-9]{1,2})*"/> but with the last asterisk replaced by that number stored in the other element.

I succesfully have similar tests included to verify that IDs of element sequences match provided counts, but can't figure out how to creat such a regexp test with dynamically defined pattern value.

Upvotes: 0

Views: 27

Answers (1)

FordPrefect
FordPrefect

Reputation: 406

This can be achieved with the help of xs:assert, fn:matches and concat.

The assertion at a level that can reach all needed elements as children looks like the following.

<xs:assert test='every $line in Values/Line satisfies fn:matches($line, concat("^-?[0-9]*\.[0-9]{1,2}(,-?[0-9]*\.[0-9]{1,2}){",xs:string(Count - 1),"}$"))'/>

Upvotes: 0

Related Questions