e: nowrap"><a href="http://hl7.org/fhir/R4/conformance-rules.html#conformance">Control</a></td><td>0..*<br/>This element is affected by the following invariants: ele-1</td></tr><tr><td style="white-space: nowrap"><a href="http://hl7.org/fhir/R4/conformance-rules.html#ismodifier">Is Modifier</a></td><td>false</td></tr><tr><td style="white-space: nowrap">Invariants</td><td><b title="Formal Invariant Identifier">ele-1</b>: All FHIR elements must have a @value or children (<code>hasValue() or (children().count(