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Parent Package: navigation
Class SECTION

CONTENT_ITEM
   |
   +--SECTION
Represents a heading in a heading structure, or “section tree”.

Attributes from Associations
	Signature	Optionality	Multiplicity	Documentation
	items : List<CONTENT_ITEM>	0..1	0..* ordered

Constraints
Name	Expression
tems_valid	inv: items <> Void implies not items.is_empty