xtce:ValidityCondition 

Optional condition that must be true for this Parameter to be valid

Element Information

Model

xtce:Comparison | xtce:ComparisonList | xtce:BooleanExpression | xtce:CustomAlgorithm
Children: xtce:BooleanExpression, xtce:Comparison, xtce:ComparisonList, xtce:CustomAlgorithm

Source 

<element name="ValidityCondition" type="xtce:MatchCriteriaType" minOccurs="0">
  <annotation>
    <documentation>Optional condition that must be true for this Parameter to be valid</documentation>
  </annotation>
</element>

Sample