What does isSummary=true mean in a type profile? Especially, what does it mean in the "root" element of a type:
<element>
<path value="CodeableConcept"/>
<short value="Concept - reference to a terminology or just text"/>
<min value="0"/>
<max value="*"/>
<type>
<code value="Element"/>
</type>
<isSummary value="true"/>
</element>