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The ability to say that an attribute is allowed to occur at most once in a role group. However, if the attribute is present, then it must be present in every repeat of that role group. - e.g. |Occurrence| attribute
See ticket #22789
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The ability to say that an attribute is allowed to occur at most once in a role group. However, if the attribute is present, then it must be present in every repeat of that role group. - e.g. |Occurrence| attribute
See ticket #22789