Name	Flags	Card.	Type	Description & Constraints
ElementDefinition	N		Element	Definition of an element in a resource or extension + Rule: Min <= Max + Rule: if the element definition has a contentReference, it cannot have type, defaultValue, fixed, pattern, example, minValue, maxValue, maxLength, or binding + Rule: Fixed value may only be specified if there is one type + Rule: Pattern may only be specified if there is one type + Rule: Pattern and fixed are mutually exclusive + Rule: Binding can only be present for coded elements, string, and uri if using FHIR-defined types + Rule: Types must be unique by code + Rule: Constraints must be unique by key + Rule: default value and meaningWhenMissing are mutually exclusive + Rule: sliceName must be composed of proper tokens separated by "/" + Rule: Must have a modifier reason if isModifier = true + Rule: Element path SHALL be expressed as a set of '.'-separated components with each component restricted to a maximum of 64 characters and with some limits on the allowed choice of characters + Warning: The first component of the path should be UpperCamelCase. Additional components (following a '.') should be lowerCamelCase. If this syntax is not adhered to, code generation tools may be broken. Logical models may be less concerned about this implication. + Rule: sliceIsConstraining can only appear if slicename is present + Guideline: pattern[x] should be used rather than fixed[x] + Warning: Order has no meaning (and cannot be asserted to have meaning), so enforcing rules on order is improper + Warning: Mappings SHOULD be unique by key + Rule: Can't have valueAlternatives if mustHaveValue is true Elements defined in Ancestors: id, extension, modifierExtension
path	C	1..1	string	Path of the element in the hierarchy of elements
representation		0..*	code	xmlAttr | xmlText | typeAttr | cdaText | xhtml Binding: PropertyRepresentation ( Required)
sliceName	C	0..1	string	Name for this particular element (in a set of slices)
sliceIsConstraining	C TU	0..1	boolean	If this slice definition constrains an inherited slice definition (or not)
label	T	0..1	string	Name for element to display with or prompt for element
code		0..*	Coding	Corresponding codes in terminologies Binding: ElementDefinitionCode ( Example)
slicing	C	0..1	Element	This element is sliced - slices follow
discriminator		0..*	Element	Element values that are used to distinguish the slices
type		1..1	code	value | exists | type | profile | position Binding: DiscriminatorType ( Required)
path		1..1	string	Path to element value
description	T	0..1	string	Text description of how slicing works (or not)
ordered	C	0..1	boolean	If elements must be in same order as slices
rules	C	1..1	code	closed | open | openAtEnd Binding: SlicingRules ( Required)
short	T	0..1	string	Concise definition for space-constrained presentation
definition	T	0..1	markdown	Full formal definition as narrative text
comment	T	0..1	markdown	Comments about the use of this element
requirements	T	0..1	markdown	Why this resource has been created
alias	T	0..*	string	Other names
min	C	0..1	unsignedInt	Minimum Cardinality
max	C	0..1	string	Maximum Cardinality (a number or *) + Rule: Max SHALL be a number or "*"
base		0..1	Element	Base definition information for tools
path		1..1	string	Path that identifies the base element
min		1..1	unsignedInt	Min cardinality of the base element
max		1..1	string	Max cardinality of the base element
contentReference	C	0..1	uri	Reference to definition of content for the element
type	C	0..*	Element	Data type and Profile for this element + Rule: Aggregation may only be specified if one of the allowed types for the element is a reference + Rule: targetProfile is only allowed if the type is Reference or canonical
code	C	1..1	uri	Data type or Resource (reference to definition) Binding: Element Definition Types ( Extensible)
profile		0..*	canonical( StructureDefinition | ImplementationGuide)	Profiles (StructureDefinition or IG) - one must apply
targetProfile	C	0..*	canonical( StructureDefinition | ImplementationGuide)	Profile (StructureDefinition or IG) on the Reference/canonical target - one must apply
aggregation	C	0..*	code	contained | referenced | bundled - how aggregated Binding: AggregationMode ( Required)
versioning		0..1	code	either | independent | specific Binding: ReferenceVersionRules ( Required)
defaultValue[x]	C	0..1	*	Specified value if missing from instance
meaningWhenMissing	T C	0..1	markdown	Implicit meaning when this element is missing
orderMeaning	C	0..1	string	What the order of the elements means
fixed[x]	C	0..1	*	Value must be exactly this
pattern[x]	C	0..1	*	Value must have at least these property values
example	C	0..*	Element	Example value (as defined for type)
label	T	1..1	string	Describes the purpose of this example
value[x]		1..1	*	Value of Example (one of allowed types)
minValue[x]	C	0..1		Minimum Allowed Value (for some types)
minValueDate			date
minValueDateTime			dateTime
minValueInstant			instant
minValueTime			time
minValueDecimal			decimal
minValueInteger			integer
minValueInteger64			integer64
minValuePositiveInt			positiveInt
minValueUnsignedInt			unsignedInt
minValueQuantity			Quantity
maxValue[x]	C	0..1		Maximum Allowed Value (for some types)
maxValueDate			date
maxValueDateTime			dateTime
maxValueInstant			instant
maxValueTime			time
maxValueDecimal			decimal
maxValueInteger			integer
maxValueInteger64			integer64
maxValuePositiveInt			positiveInt
maxValueUnsignedInt			unsignedInt
maxValueQuantity			Quantity
maxLength	C	0..1	integer	Max length for string type data
condition		0..*	id	Reference to invariant about presence
constraint	C	0..*	Element	Condition that must evaluate to true + Warning: Constraints should have an expression or else validators will not be able to enforce them + Rule: Errors cannot be suppressed
key	C	1..1	id	Target of 'condition' reference above
requirements		0..1	markdown	Why this constraint is necessary or appropriate
severity	C	1..1	code	error | warning Binding: ConstraintSeverity ( Required)
suppress	C TU	0..1	boolean	Suppress warning or hint in profile
human	T	1..1	string	Human description of constraint
expression	C	0..1	string	FHIRPath expression of constraint
source		0..1	canonical( StructureDefinition)	Reference to original source of constraint
mustHaveValue	C TU	0..1	boolean	For primitives, that a value must be present - not replaced by an extension
valueAlternatives	C TU	0..*	canonical( StructureDefinition)	Extensions that are allowed to replace a primitive value
mustSupport		0..1	boolean	If the element must be supported (discouraged - see obligations)
isModifier	C	0..1	boolean	If this modifies the meaning of other elements
isModifierReason	C	0..1	string	Reason that this element is marked as a modifier
isSummary		0..1	boolean	Include when _summary = true?
binding	C	0..1	Element	ValueSet details if this is coded + Rule: ValueSet SHALL start with http:// or https:// or urn: or # + Rule: binding SHALL have either description or valueSet
strength		1..1	code	required | extensible | preferred | example Binding: BindingStrength ( Required)
description	T C	0..1	markdown	Intended use of codes in the bound value set
valueSet	C	0..1	canonical( ValueSet)	Source of value set
additional	TU	0..*	Element	Additional Bindings - more rules about the binding
purpose		1..1	code	maximum | minimum | required | extensible | candidate | current | preferred | ui | starter | component Binding: Additional Binding Purpose ValueSet ( Required)
valueSet		1..1	canonical( ValueSet)	The value set for the additional binding
documentation		0..1	markdown	Documentation of the purpose of use of the binding
shortDoco		0..1	string	Concise documentation - for summary tables
usage		0..*	UsageContext	Qualifies the usage - jurisdiction, gender, workflow status etc.
any		0..1	boolean	Whether binding can applies to all repeats, or just one
mapping	C	0..*	Element	Map element to another set of definitions
identity	C	1..1	id	Reference to mapping declaration
language		0..1	code	Computable language of mapping Binding: Mime Types ( Required)
map		1..1	string	Details of the mapping
comment		0..1	markdown	Comments about the mapping or its use
Documentation for this format