<status value="draft"/><experimental value="false"/><date value="2018-08-19T21:48:56+10:00"/><description value="A set of generally useful codes defined so they can be included in value sets."/><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/special-values"/><content value="complete"/><concept><code value="true"/><display value="true"/><definition value="Boolean true."/></concept><concept><code value="false"/><display value="false"/><definition value="Boolean false."/></concept><concept><code value="trace"/><display value="Trace Amount Detected"/><definition value="The content is greater than zero, but too small to be quantified."/></concept><concept><extension url="http://hl7.org/fhir/StructureDefinition/codesystem-comments"><valueString value="used in formulations (e.g. 'Add 10mg of ingredient X, 50mg of ingredient Y, and sufficient quantity of water to 100mL.' This code would be used to express the quantity of water. )"/></extension><code value="sufficient"/><display value="Sufficient Quantity"/><definition value="The specific quantity is not known, but is known to be non-zero and is not specified because it makes up the bulk of the material."/></concept><concept><code value="withdrawn"/><display value="Value Withdrawn"/><definition value="The value is no longer available."/></concept><concept><extension url="http://hl7.org/fhir/StructureDefinition/codesystem-comments"><valueString value="The existence of this subject to review"/></extension><code value="nil-known"/><display value="Nil Known"/><definition value="The are no known applicable values in this context."/></concept></CodeSystem>

SpecialValues

A set of generally useful codes defined so they can be included in value sets.

This code system http://terminology.hl7.org/CodeSystem/special-values defines the following codes:

Code	Display	Definition	Comments
true	true	Boolean true.
false	false	Boolean false.
trace	Trace Amount Detected	The content is greater than zero, but too small to be quantified.
sufficient	Sufficient Quantity	The specific quantity is not known, but is known to be non-zero and is not specified because it makes up the bulk of the material.	used in formulations (e.g. 'Add 10mg of ingredient X, 50mg of ingredient Y, and sufficient quantity of water to 100mL.' This code would be used to express the quantity of water. )
withdrawn	Value Withdrawn	The value is no longer available.
nil-known	Nil Known	The are no known applicable values in this context.	The existence of this subject to review