Documentation: Definition: The Boolean type stands for the values of two-valued logic. A Boolean value can be either true or false, or, as any other value may be NULL. Exhibit 30: type Boolean alias BL specializes ANY values(true, false) { BL and(BL x); BL not; literal ST; BL or(BL x); BL xor(BL x); BL implies(BL x); };

Superclasses

• DataValue
• Criterion

Subclasses

• BooleanNonNull

Types

• HL7_Data_Type

Template Slots
	Slot Name	Documentation	Type	Cardinality
	label	A short human readable string indicating the content of the instancehuman-readable string for the instance	String	0:1
	nullFlavor	If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing.	Class	0:1
	value	A data value	Boolean	0:1

Own Slots
	Slot Name	Value
	alias	BL
	semantic_properties	BL and(BL x); BL not; BL or(BL x); BL xor(BL x); BL implies(BL x);
	:ROLE	Concrete
	:SLOT-CONSTRAINTS

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