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ValueSet
default
A search parameter that defines a named search item that can be used to search/filter on a resource.
SearchParameter
Path
SearchParameter
Id
SearchParameter
Cardinality
0 - *
Definition
A search parameter that defines a named search item that can be used to search/filter on a resource.
Comment
In FHIR, search is not performed directly on a resource (by XML or JSON path), but on a named parameter that maps into the resource content.
Constraint
dom-2 [error]
If the resource is contained in another resource, it SHALL NOT contain nested Resources
dom-3 [error]
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 [error]
If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated
dom-5 [error]
If a resource is contained in another resource, it SHALL NOT have a security label
dom-6 [warning]
A resource should have narrative for robust management
spd-0 [warning]
Name should be usable as an identifier for the module by machine processing applications such as code generation
spd-1 [error]
If an xpath is present, there SHALL be an xpathUsage
spd-2 [error]
Search parameters can only have chain names when the search parameter type is 'reference'
Path
SearchParameter.url
Id
SearchParameter.url
Type
Cardinality
1 - 1
Definition
An absolute URI that is used to identify this search parameter when it is referenced in a specification, model, design or an instance; also called its canonical identifier. This SHOULD be globally unique and SHOULD be a literal address at which at which an authoritative instance of this search parameter is (or will be) published. This URL can be the target of a canonical reference. It SHALL remain the same when the search parameter is stored on different servers.
Comment
Can be a urn:uuid: or a urn:oid: but real http: addresses are preferred. Multiple instances may share the same URL if they have a distinct version.
The determination of when to create a new version of a resource (same url, new version) vs. defining a new artifact is up to the author. Considerations for making this decision are found in [Technical and Business Versions](resource.html#versions).
In some cases, the resource can no longer be found at the stated url, but the url itself cannot change. Implementations can use the [meta.source](resource.html#meta) element to indicate where the current master source of the resource can be found.
Requirements
Allows the search parameter to be referenced by a single globally unique identifier. To allow referencing and reusing search parameter definitions under other names on operational systems (in case of name clash).
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.version
Id
SearchParameter.version
Type
Cardinality
0 - 1
Definition
The identifier that is used to identify this version of the search parameter when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the search parameter author and is not expected to be globally unique. For example, it might be a timestamp (e.g. yyyymmdd) if a managed version is not available. There is also no expectation that versions can be placed in a lexicographical sequence.
Comment
There may be different search parameter instances that have the same identifier but different versions. The version can be appended to the url in a reference to allow a reference to a particular business version of the search parameter with the format [url]|[version].
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.name
Id
SearchParameter.name
Type
Cardinality
1 - 1
Definition
A natural language name identifying the search parameter. This name should be usable as an identifier for the module by machine processing applications such as code generation.
Comment
The name is not expected to be globally unique. The name should be a simple alphanumeric type name to ensure that it is machine-processing friendly.
Requirements
Support human navigation and code generation.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.derivedFrom
Id
SearchParameter.derivedFrom
Type
Cardinality
0 - 1
Definition
Where this search parameter is originally defined. If a derivedFrom is provided, then the details in the search parameter must be consistent with the definition from which it is defined. i.e. the parameter should have the same meaning, and (usually) the functionality should be a proper subset of the underlying search parameter.
Comment
The intent of this is that a server can designate that it provides support for a search parameter defined in the specification itself (e.g. [`value-quantity`](http://hl7.org/fhir/SearchParameter/Observation-value-quantity), but detail how it is supported by the server.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.status
Id
SearchParameter.status
Type
Cardinality
1 - 1
Definition
The status of this search parameter. Enables tracking the life-cycle of the content.
Comment
Allows filtering of search parameters that are appropriate for use versus not.
Binding
Strength
required
Description
The lifecycle status of an artifact.
ValueSet
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.experimental
Id
SearchParameter.experimental
Type
Cardinality
0 - 1
Definition
A Boolean value to indicate that this search parameter is authored for testing purposes (or education/evaluation/marketing) and is not intended to be used for genuine usage.
Comment
Allows filtering of search parameters that are appropriate for use versus not.
Requirements
Enables experimental content to be developed following the same lifecycle that would be used for a production-level search parameter.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.date
Id
SearchParameter.date
Type
Cardinality
0 - 1
Definition
The date (and optionally time) when the search parameter was published. The date must change when the business version changes and it must change if the status code changes. In addition, it should change when the substantive content of the search parameter changes.
Comment
Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the search parameter. Additional specific dates may be added as extensions or be found by consulting Provenances associated with past versions of the resource.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.publisher
Id
SearchParameter.publisher
Type
Cardinality
0 - 1
Definition
The name of the organization or individual that published the search parameter.
Comment
Usually an organization but may be an individual. The publisher (or steward) of the search parameter is the organization or individual primarily responsible for the maintenance and upkeep of the search parameter. This is not necessarily the same individual or organization that developed and initially authored the content. The publisher is the primary point of contact for questions or issues with the search parameter. This item SHOULD be populated unless the information is available from context.
Requirements
Helps establish the "authority/credibility" of the search parameter. May also allow for contact.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.contact
Id
SearchParameter.contact
Type
Cardinality
0 - *
Definition
Contact details to assist a user in finding and communicating with the publisher.
Comment
May be a web site, an email address, a telephone number, etc.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.contact.ContactDetail.name
Id
ContactDetail.name
Type
Cardinality
0 - 1
Definition
The name of an individual to contact.
Comment
If there is no named individual, the telecom information is for the organization as a whole.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.contact.ContactDetail.telecom
Id
ContactDetail.telecom
Type
Cardinality
0 - *
Definition
The contact details for the individual (if a name was provided) or the organization.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.contact.ContactDetail.telecom.ContactPoint.system
Id
ContactPoint.system
Type
Cardinality
0 - 1
Definition
Telecommunications form for contact point - what communications system is required to make use of the contact.
Comment
Binding
Strength
required
Description
ValueSet
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
cpt-2
Path
SearchParameter.contact.ContactDetail.telecom.ContactPoint.value
Id
ContactPoint.value
Type
Cardinality
0 - 1
Definition
The actual contact point details, in a form that is meaningful to the designated communication system (i.e. phone number or email address).
Comment
Additional text data such as phone extension numbers, or notes about use of the contact are sometimes included in the value.
Requirements
Need to support legacy numbers that are not in a tightly controlled format.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.contact.ContactDetail.telecom.ContactPoint.use
Id
ContactPoint.use
Type
Cardinality
0 - 1
Definition
Identifies the purpose for the contact point.
Comment
Applications can assume that a contact is current unless it explicitly says that it is temporary or old.
Requirements
Need to track the way a person uses this contact, so a user can choose which is appropriate for their purpose.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.contact.ContactDetail.telecom.ContactPoint.rank
Id
ContactPoint.rank
Type
Cardinality
0 - 1
Definition
Specifies a preferred order in which to use a set of contacts. ContactPoints with lower rank values are more preferred than those with higher rank values.
Comment
Note that rank does not necessarily follow the order in which the contacts are represented in the instance.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.contact.ContactDetail.telecom.ContactPoint.period
Id
ContactPoint.period
Type
Cardinality
0 - 1
Definition
Time period when the contact point was/is in use.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.contact.ContactDetail.telecom.ContactPoint.period.Period.start
Id
Period.start
Type
Cardinality
0 - 1
Definition
The start of the period. The boundary is inclusive.
Comment
If the low element is missing, the meaning is that the low boundary is not known.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
per-1
Path
SearchParameter.contact.ContactDetail.telecom.ContactPoint.period.Period.end
Id
Period.end
Type
Cardinality
0 - 1
Definition
The end of the period. If the end of the period is missing, it means no end was known or planned at the time the instance was created. The start may be in the past, and the end date in the future, which means that period is expected/planned to end at that time.
Comment
The high value includes any matching date/time. i.e. 2012-02-03T10:00:00 is in a period that has an end value of 2012-02-03.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
per-1
Path
SearchParameter.description
Id
SearchParameter.description
Type
Cardinality
1 - 1
Definition
And how it used.
Comment
This description can be used to capture details such as why the search parameter was built, comments about misuse, instructions for clinical use and interpretation, literature references, examples from the paper world, etc. It is not a rendering of the search parameter as conveyed in the 'text' field of the resource itself. This item SHOULD be populated unless the information is available from context (e.g. the language of the search parameter is presumed to be the predominant language in the place the search parameter was created).
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext
Id
SearchParameter.useContext
Type
Cardinality
0 - *
Definition
The content was developed with a focus and intent of supporting the contexts that are listed. These contexts may be general categories (gender, age, ...) or may be references to specific programs (insurance plans, studies, ...) and may be used to assist with indexing and searching for appropriate search parameter instances.
Comment
When multiple useContexts are specified, there is no expectation that all or any of the contexts apply.
Requirements
Assist in searching for appropriate content.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.code
Id
UsageContext.code
Type
Cardinality
1 - 1
Definition
A code that identifies the type of context being specified by this usage context.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.code.Coding.system
Id
Coding.system
Type
Cardinality
0 - 1
Definition
The identification of the code system that defines the meaning of the symbol in the code.
Comment
The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.
Requirements
Need to be unambiguous about the source of the definition of the symbol.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.code.Coding.version
Id
Coding.version
Type
Cardinality
0 - 1
Definition
The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Comment
Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.code.Coding.code
Id
Coding.code
Type
Cardinality
0 - 1
Definition
A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Comment
Requirements
Need to refer to a particular code in the system.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.code.Coding.display
Id
Coding.display
Type
Cardinality
0 - 1
Definition
A representation of the meaning of the code in the system, following the rules of the system.
Comment
Requirements
Need to be able to carry a human-readable meaning of the code for readers that do not know the system.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.code.Coding.userSelected
Id
Coding.userSelected
Type
Cardinality
0 - 1
Definition
Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).
Comment
Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
Requirements
This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.value[x]
Id
UsageContext.value[x]
Type
Cardinality
1 - 1
Definition
A value that defines the context specified in this context of use. The interpretation of the value is defined by the code.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.value[x].CodeableConcept.coding
Id
CodeableConcept.coding
Type
Cardinality
0 - *
Definition
A reference to a code defined by a terminology system.
Comment
Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.
Requirements
Allows for alternative encodings within a code system, and translations to other code systems.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.value[x].CodeableConcept.coding.Coding.system
Id
Coding.system
Type
Cardinality
0 - 1
Definition
The identification of the code system that defines the meaning of the symbol in the code.
Comment
The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.
Requirements
Need to be unambiguous about the source of the definition of the symbol.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.value[x].CodeableConcept.coding.Coding.version
Id
Coding.version
Type
Cardinality
0 - 1
Definition
The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Comment
Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.value[x].CodeableConcept.coding.Coding.code
Id
Coding.code
Type
Cardinality
0 - 1
Definition
A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Comment
Requirements
Need to refer to a particular code in the system.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.value[x].CodeableConcept.coding.Coding.display
Id
Coding.display
Type
Cardinality
0 - 1
Definition
A representation of the meaning of the code in the system, following the rules of the system.
Comment
Requirements
Need to be able to carry a human-readable meaning of the code for readers that do not know the system.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.useContext.UsageContext.value[x].CodeableConcept.coding.Coding.userSelected
Id
Coding.userSelected
Type
Cardinality
0 - 1
Definition
Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).
Comment
Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
Requirements
This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.jurisdiction
Id
SearchParameter.jurisdiction
Type
Cardinality
0 - *
Definition
A legal or geographic region in which the search parameter is intended to be used.
Comment
It may be possible for the search parameter to be used in jurisdictions other than those for which it was originally designed or intended.
Binding
Strength
extensible
Description
Countries and regions within which this artifact is targeted for use.
ValueSet
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.jurisdiction.CodeableConcept.coding
Id
CodeableConcept.coding
Type
Cardinality
0 - *
Definition
A reference to a code defined by a terminology system.
Comment
Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.
Requirements
Allows for alternative encodings within a code system, and translations to other code systems.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.jurisdiction.CodeableConcept.coding.Coding.system
Id
Coding.system
Type
Cardinality
0 - 1
Definition
The identification of the code system that defines the meaning of the symbol in the code.
Comment
The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.
Requirements
Need to be unambiguous about the source of the definition of the symbol.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.jurisdiction.CodeableConcept.coding.Coding.version
Id
Coding.version
Type
Cardinality
0 - 1
Definition
The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Comment
Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.jurisdiction.CodeableConcept.coding.Coding.code
Id
Coding.code
Type
Cardinality
0 - 1
Definition
A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Comment
Requirements
Need to refer to a particular code in the system.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.jurisdiction.CodeableConcept.coding.Coding.display
Id
Coding.display
Type
Cardinality
0 - 1
Definition
A representation of the meaning of the code in the system, following the rules of the system.
Comment
Requirements
Need to be able to carry a human-readable meaning of the code for readers that do not know the system.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.jurisdiction.CodeableConcept.coding.Coding.userSelected
Id
Coding.userSelected
Type
Cardinality
0 - 1
Definition
Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).
Comment
Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
Requirements
This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.purpose
Id
SearchParameter.purpose
Type
Cardinality
0 - 1
Definition
Explanation of why this search parameter is needed and why it has been designed as it has.
Comment
This element does not describe the usage of the search parameter. Instead, it provides traceability of ''why'' the resource is either needed or ''why'' it is defined as it is. This may be used to point to source materials or specifications that drove the structure of this search parameter.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.code
Id
SearchParameter.code
Type
Cardinality
1 - 1
Definition
The code used in the URL or the parameter name in a parameters resource for this search parameter.
Comment
For maximum compatibility, use only lowercase ASCII characters.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.base
Id
SearchParameter.base
Type
Cardinality
1 - *
Definition
The base resource type(s) that this search parameter can be used against.
Comment
A search parameter must always apply to at least one resource type. When search parameters apply to more than one resource type, they can be used against any of the listed resource types, or in a cross-type search (see [Cross Resource Search](http.html#xres-search)).
Binding
Strength
required
Description
One of the resource types defined as part of this version of FHIR.
ValueSet
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.type
Id
SearchParameter.type
Type
Cardinality
1 - 1
Definition
The type of value that a search parameter may contain, and how the content is interpreted.
Comment
Binding
Strength
required
Description
Data types allowed to be used for search parameters.
ValueSet
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.expression
Id
SearchParameter.expression
Type
Cardinality
0 - 1
Definition
A FHIRPath expression that returns a set of elements for the search parameter.
Comment
Note that the elements returned by the expression are sometimes complex elements where logic is required to determine quite how to handle them; e.g. CodeableConcepts may contain text and/or multiple codings, where the codings themselves contain a code and a system. For composite search parameters, the outcome of the expression must a collection of base elements from which the composites are derived.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
spd-1
Path
SearchParameter.xpath
Id
SearchParameter.xpath
Type
Cardinality
0 - 1
Definition
An XPath expression that returns a set of elements for the search parameter.
Comment
Note that the elements returned by the XPath are sometimes complex elements where logic is required to determine quite how to handle them; e.g. CodeableConcepts may contain text and/or multiple codings, where the codings themselves contain a code and a system.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
spd-1
Path
SearchParameter.xpathUsage
Id
SearchParameter.xpathUsage
Type
Cardinality
0 - 1
Definition
How the search parameter relates to the set of elements returned by evaluating the xpath query.
Comment
Binding
Strength
required
Description
How a search parameter relates to the set of elements returned by evaluating its xpath query.
ValueSet
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Condition
spd-1
Path
SearchParameter.target
Id
SearchParameter.target
Type
Cardinality
0 - *
Definition
Types of resource (if a resource is referenced).
Comment
Binding
Strength
required
Description
One of the resource types defined as part of this version of FHIR.
ValueSet
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.multipleOr
Id
SearchParameter.multipleOr
Type
Cardinality
0 - 1
Definition
Whether multiple values are allowed for each time the parameter exists. Values are separated by commas, and the parameter matches if any of the values match.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.multipleAnd
Id
SearchParameter.multipleAnd
Type
Cardinality
0 - 1
Definition
Whether multiple parameters are allowed - e.g. more than one parameter with the same name. The search matches if all the parameters match.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.comparator
Id
SearchParameter.comparator
Type
Cardinality
0 - *
Definition
Comparators supported for the search parameter.
Comment
If no comparators are listed, clients should not expect servers to support any comparators.
Binding
Strength
required
Description
What Search Comparator Codes are supported in search.
ValueSet
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
modifier
missing | exact | contains | not | text | in | not-in | below | above | type | identifier | ofType
Path
SearchParameter.modifier
Id
SearchParameter.modifier
Type
Cardinality
0 - *
Definition
A modifier supported for the search parameter.
Comment
Binding
Strength
required
Description
A supported modifier for a search parameter.
ValueSet
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.chain
Id
SearchParameter.chain
Type
Cardinality
0 - *
Definition
Contains the names of any search parameters which may be chained to the containing search parameter. Chained parameters may be added to search parameters of type reference and specify that resources will only be returned if they contain a reference to a resource which matches the chained parameter value. Values for this field should be drawn from SearchParameter.code for a parameter on the target resource type.
Comment
Systems are not required to list all the chain names they support, but if they don't list them, clients might not know to use them.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.component
Id
SearchParameter.component
Type
Cardinality
0 - *
Definition
Used to define the parts of a composite search parameter.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children unless an empty Parameters resource
Path
SearchParameter.component.definition
Id
SearchParameter.component.definition
Type
Cardinality
1 - 1
Definition
The definition of the search parameter that describes this part.
Comment
Constraint
ele-1 [error]
All FHIR elements must have a @value or children
Path
SearchParameter.component.expression
Id
SearchParameter.component.expression
Type
Cardinality
1 - 1
Definition
A sub-expression that defines how to extract values for this component from the output of the main SearchParameter.expression.
Comment
This expression overrides the expression in the definition and extracts the index values from the outcome of the composite expression.
Constraint
ele-1 [error]
All FHIR elements must have a @value or children