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 A constraint on the number of times that a specific attribute may be included in the same attribute group.


  • Constraints on attribute in group cardinality apply only to non-redundant attributes. A redundant attribute is an attribute with a value that is subsumed by another attribute in the same group.
  • Cardinality constraints are represented by square brackets containing a minimum value value represented as an integer, optionally followed by two dots and a maximum value represented as an integer or as an asterisk *.
    • If the maximum is omitted then the maximum cardinality is the same as the minimum cardinality.
    • If the maximum is an asterisk * the maximum cardinality is unlimited.
  • Attribute in group cardinality is NOT the same as attribute group cardinality constraint.

    Attribute group cardinality constraint is defined as: A constraint on the number of times that an <a href="" title="Glossary link: attribute group" rel="nofollow" class="conf-macro output-inline" data-hasbody="false" data-macro-name="gloss">attribute group</a> may be included in the same <a href="" title="Glossary link: concept definition" rel="nofollow" class="conf-macro output-inline" data-hasbody="false" data-macro-name="gloss">concept definition</a> or <a href="" title="Glossary link: expression" rel="nofollow" class="conf-macro output-inline" data-hasbody="false" data-macro-name="gloss">expression</a>.



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