Documentation: An instance of 'Variable' is a placeholder for a value of certain datatype. The 'referenced_as' is a string (e.g. ?DOB) that can be used to reference an instance of a variable in an expression. If the value of a variable can be computed or queried, the formula or query should be specified in the 'derivation_expression' slot. The 'update_expression' slot should be an expressio for writing the value of the variable into VMR. The slot 'prompt' holds a string that can be displayed when acquiring the value from a user.

Superclasses

• Expression

Subclasses

• None

Types

• :STANDARD-CLASS

Template Slots
	Slot Name	Documentation	Type	Cardinality
	datatype	The data type of the variable	Class	1:1
	derivation_expression	This is the query to make or expression to evaluate in order to get the value of the variable	Expression	0:1
	label	A short human readable string indicating the content of the instancehuman-readable string for the instance	String	0:1
	prompt	Text string used to indicate what kind of value should be entered.	String	0:1
	referenced_as	value of "referenced_as" slot is a string by which the variable can be referenced elsewhere (e.g., as part of a string)	String	0:1
	update_expression	Update expression is a string that specifies how the value of the variable should be stored into the virtual medical record	String	0:1

Own Slots
	Slot Name	Value
	:ROLE	Concrete
	:SLOT-CONSTRAINTS

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