Distance

A length - a value with a unit that is a physical distance.

= Must Support, = Is Modifier, = QiCore defined extension

Field	Card.	Type	Description
value	0..1	Decimal	The value of the measured amount. The value includes an implicit precision in the presentation of the value.
comparator	0..1	String	How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value.
unit	0..1	String	A human-readable form of the unit.
system	0..1	String	The identification of the system that provides the coded form of the unit.
code	0..1	String	A computer processable form of the unit in some unit representation system.