FHIR R4 Observation Standard search parameters

	B	C	D	E	F	G	H
1
2		Top-level only		Combo (top-level + components)		Components only
3		Composite	Value-only	Composite	Value-only	Composite	Value-only
4
5	valueQuantity	code-value-quantity	value-quantity	combo-code-value-quantity	combo-value-quantity	component-code-value-quantity	component-value-quantity
6	valueCodeableConcept	code-value-concept	value-concept	combo-code-value-concept	combo-value-concept	component-code-value-concept	component-value-concept
7	valueString	code-value-string	value-string
8	valueBoolean
9	valueInteger
10	valueRange
11	valueRatio	"There is no standard parameter for searching values of type Ratio"
12	valueSampledData	code-value-quantity	value-quantity	combo-code-value-quantity	combo-value-quantity	component-code-value-quantity	component-value-quantity
13	valueTime
14	valueDateTime	code-value-date	value-date
15	valuePeriod	code-value-date	value-date
16
17	Parameter	Description not reflected in FHIRPath expression?
18	*value-quantity	"or a SampledData (just search on the bounds of the values in sampled data)"
19	value-string	"also searches in CodeableConcept.text" (inconsistent with code-value-string)
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23	From FHIR Release 4 Candidate (v3.5.0-14939) generated on Sun, Sep 2, 2018 12:47+0000
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