A Canonical Decomposable Character which has the property value Full_Composition_Exclusion=True.

• Full composition exclusions consist of the entire list of composition exclusions plus all characters with singleton decompositions or with non-starter decompositions.
• For convenience in implementation of Unicode normalization, the derived property Full_Composition_Exclusion is computed, and all characters with the property value Full_Composition_Exclusion=True are listed in DerivedNormalizationProps.txt in the Unicode Character Database.