Union of http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-pregnancyintent and http://hl7.org/fhir/us/bfdr/StructureDefinition/Observation-fetal-presentation

This is the set of resources that conform to either of the profiles US Core Observation Pregnancy Intent Profile (http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-pregnancyintent) and Observation - Fetal Presentation at Birth/Delivery (http://hl7.org/fhir/us/bfdr/StructureDefinition/Observation-fetal-presentation). E.g. what you have to deal with if you get resources conforming to one of them

Structure

Name	Flags	Card.	Type	Description & Constraints
Observation	C	0..*		Measurements and simple assertions dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated dom-5: If a resource is contained in another resource, it SHALL NOT have a security label dom-6: A resource should have narrative for robust management obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present obs-7: If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present
meta	Σ	0..1	Meta	Metadata about the resource ele-1: All FHIR elements must have a @value or children
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created ele-1: All FHIR elements must have a @value or children
language		0..1	code	Language of the resource content Binding: ?? (preferred): A human language. ele-1: All FHIR elements must have a @value or children
text		0..1	Narrative	Text summary of the resource, for human interpretation ele-1: All FHIR elements must have a @value or children
contained		0..*	Resource	Contained, inline Resources
extension		0..*	Extension	Additional content defined by implementations ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
identifier	Σ	0..*	Identifier	Business Identifier for observation ele-1: All FHIR elements must have a @value or children
basedOn	Σ	0..*	Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest)	Fulfills plan, proposal or order ele-1: All FHIR elements must have a @value or children
partOf	Σ	0..*	Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy)	Part of referenced event ele-1: All FHIR elements must have a @value or children
status	?!SΣ	1..1	code	registered | preliminary | final | amended + Binding: ?? (required): Codes providing the status of an observation. ele-1: All FHIR elements must have a @value or children
category	S	0..*	CodeableConcept	Classification of type of observation Binding: ?? (preferred): Codes for high level observation categories. ele-1: All FHIR elements must have a @value or children
code	SΣ	1..1	CodeableConcept	left: Pregnancy Status; right: Fetal presentation at birth/delivery Binding: ?? (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children
subject	SΣ	1..1	Reference(US Core Patient Profile)	Who and/or what the observation is about ele-1: All FHIR elements must have a @value or children
focus	Σ	0..*	Reference(Resource)	What the observation is about, when it is not about the subject of record ele-1: All FHIR elements must have a @value or children
encounter	Σ	0..1	Reference(Encounter)	Healthcare event during which this observation is made ele-1: All FHIR elements must have a @value or children
effective[x]	Σ	0..1		Clinically relevant time/time-period for observation ele-1: All FHIR elements must have a @value or children
effectiveDateTime			dateTime
effectivePeriod			Period
effectiveTiming			Timing
effectiveInstant			instant
issued	Σ	0..1	instant	Date/Time this version was made available ele-1: All FHIR elements must have a @value or children
performer	Σ	0..*	Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson)	Who is responsible for the observation ele-1: All FHIR elements must have a @value or children
value[x]	Σ	1..1	CodeableConcept	left: Actual result; right: The preferred value set contains the list of reportable presentations (orientations within the mother's womb) that a fetus may be in prior to delivery. Binding: ?? (example) Additional Bindings Purpose ?? Max Binding ele-1: All FHIR elements must have a @value or children
dataAbsentReason		0..1	CodeableConcept	Why the result is missing Binding: ?? (extensible): Codes specifying why the result (Observation.value[x]) is missing. ele-1: All FHIR elements must have a @value or children
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ?? (extensible): Codes identifying interpretations of observations. ele-1: All FHIR elements must have a @value or children
note		0..*	Annotation	Comments about the observation ele-1: All FHIR elements must have a @value or children
bodySite		0..1	CodeableConcept	Observed body part Binding: ?? (example): Codes describing anatomical locations. May include laterality. ele-1: All FHIR elements must have a @value or children
method		0..1	CodeableConcept	How it was done Binding: ?? (example): Methods for simple observations. ele-1: All FHIR elements must have a @value or children
specimen		0..1	Reference(Specimen)	Specimen used for this observation ele-1: All FHIR elements must have a @value or children
device		0..1	Reference(Device | DeviceMetric)	(Measurement) Device ele-1: All FHIR elements must have a @value or children
referenceRange	C	0..*	BackboneElement	Provides guide for interpretation ele-1: All FHIR elements must have a @value or children obs-3: Must have at least a low or a high or text
extension		0..*	Extension	Additional content defined by implementations ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
low		0..1	??	Low Range, if relevant ele-1: All FHIR elements must have a @value or children
high		0..1	??	High Range, if relevant ele-1: All FHIR elements must have a @value or children
type		0..1	CodeableConcept	Reference range qualifier Binding: ?? (preferred): Code for the meaning of a reference range. ele-1: All FHIR elements must have a @value or children
appliesTo		0..*	CodeableConcept	Reference range population Binding: ?? (example): Codes identifying the population the reference range applies to. ele-1: All FHIR elements must have a @value or children
age		0..1	Range	Applicable age range, if relevant ele-1: All FHIR elements must have a @value or children
text		0..1	string	Text based reference range in an observation ele-1: All FHIR elements must have a @value or children
hasMember	Σ	0..*	Reference(Observation | QuestionnaireResponse | MolecularSequence)	Related resource that belongs to the Observation group ele-1: All FHIR elements must have a @value or children
derivedFrom	Σ	0..*	Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence)	Related measurements the observation is made from ele-1: All FHIR elements must have a @value or children
component	Σ	0..*	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
extension		0..*	Extension	Additional content defined by implementations ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: ?? (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children
value[x]	Σ	0..1		Actual component result ele-1: All FHIR elements must have a @value or children
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueBoolean			boolean
valueInteger			integer
valueRange			Range
valueRatio			Ratio
valueSampledData			SampledData
valueTime			time
valueDateTime			dateTime
valuePeriod			Period
dataAbsentReason		0..1	CodeableConcept	Why the component result is missing Binding: ?? (extensible): Codes specifying why the result (Observation.value[x]) is missing. ele-1: All FHIR elements must have a @value or children
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ?? (extensible): Codes identifying interpretations of observations. ele-1: All FHIR elements must have a @value or children
referenceRange		0..*		Provides guide for interpretation of component result ele-1: All FHIR elements must have a @value or children
Documentation for this format