Attribute: UI
States the unique MeSH identifier. Defined for <DescriptorName>, <NameOfSubstance>, <PublicationType>, <QualifierName> and <SupplMeshName> with the 2015 DTD.
In <SupplMeshName>
UI CDATA #REQUIRED
In <DescriptorName>
UI CDATA #REQUIRED
In <NameOfSubstance>
UI CDATA #REQUIRED
In <QualifierName>
UI CDATA #REQUIRED
In <PublicationType>
UI CDATA #REQUIRED