# Get FHIR r4 code systems

Endpoint: GET /site/{siteId}/fhir/code-system
Version: 1.0
Security: bearer, bearer

## Path parameters:

  - `siteId` (string, required)
    Site identifier

## Query parameters:

  - `_count` (number)
    Number of items to return (default=20).
    Example: 10

  - `_page_token` (string)
    Token for fetching the next page of results.
    Example: "CgYK..."

  - `_sort` (string)
    Sort the results by a given field, e.g. _sort=family or _sort=-date.
    Example: "family"

  - `_elements` (string)
    Restrict returned fields, e.g. _elements=identifier,name.
    Example: "identifier,name"

  - `telecom` (string)
    Filter by resource telecom, e.g. date=[SYSTEM]|[VALUE].
    Example: "telecom=phone|555-555-5555"

  - `_id` (string)
    Search for a specific resource by ID, e.g. _id=abc123.
    Example: "abc123"

  - `identifier` (string)
    Search for resources by identifier token, e.g. identifier=http://hospital.org|12345.
    Example: "http://hospital.org|12345"

  - `_include` (string)
    Include related resources, e.g. _include=Appointment:patient.
    Example: "Appointment:patient"

  - `patient` (string)
    Include related patient resources, e.g. patient=Patient/[id]&.
    Example: "patient=Patient/[id]&"

  - `_revinclude` (string)
    Reverse include related resources, e.g. _revinclude=Observation:subject.
    Example: "Observation:subject"

  - `_has` (string)
    Reverse chaining, e.g. _has:Observation:subject:code=http://loinc.org|1234-5.
    Example: "Observation:subject:code=http://loinc.org|1234-5"

  - `_tag` (string)
    Search by tag on the resource meta, e.g. _tag=http://example.org/tags|sample-tag.
    Example: "http://example.org/tags|sample-tag"

  - `_security` (string)
    Search by security label on resource meta, e.g. _security=RBAC|CONFIDENTIAL.
    Example: "RBAC|CONFIDENTIAL"

  - `_profile` (string)
    Search by profile in resource meta, e.g. _profile=http://example.org/fhir/StructureDefinition/custom-profile.
    Example: "http://example.org/fhir/StructureDefinition/custom-profile"

## Response 200 fields (application/json):

  - `resourceType` (any, required)
    This is a Bundle resource
    Enum: "Bundle"

  - `id` (string)
    Any combination of letters, numerals, "-" and ".", with a length limit of 64 characters.  (This might be an integer, an unprefixed OID, UUID or any other identifier pattern that meets these constraints.)  Ids are case-insensitive.
    Example: "example-id"

  - `meta` (object)
    The metadata about a resource. This is content in the resource that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.

  - `meta.id` (string)
    An extension object type #string.
    Example: "example-string"

  - `meta.extension` (array)
    May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

  - `meta.versionId` (object)
    An extension object type #id.

  - `meta._versionId` (object)
    An extension object type #Element.

  - `meta.lastUpdated` (object)
    An extension object type #instant.

  - `meta._lastUpdated` (object)
    An extension object type #Element.

  - `meta.source` (string)
    An extension object type #uri.
    Example: "https://example.org/resource"

  - `meta._source` (object)
    An extension object type #Element.

  - `meta.profile` (array)
    A list of profiles (references to [[[StructureDefinition]]] resources) that this resource claims to conform to. The URL is a reference to [[[StructureDefinition.url]]].
    Example: ["http://example.org/Profile"]

  - `meta.security` (array)
    Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.

  - `meta.tag` (array)
    Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.

  - `implicitRules` (string)
    String of characters used to identify a name or a resource
    Example: "https://example.org/resource"

  - `_implicitRules` (object)
    Base definition for all elements in a resource.

  - `language` (string)
    A string which has at least one character and no leading or trailing whitespace and where there is no whitespace other than single spaces in the contents
    Example: "sample-code"

  - `_language` (object)
    Base definition for all elements in a resource.

  - `identifier` (object)
    An identifier - identifies some entity uniquely and unambiguously. Typically this is used for business identifiers.

  - `identifier.use` (any)
    The purpose of this identifier.
    Enum: "usual", "official", "temp", "secondary", "old"

  - `identifier._use` (object)
    An extension object type #Element.

  - `identifier.type` (object)
    An extension object type #CodeableConcept.

  - `identifier.system` (string)
    An extension object type #uri.
    Example: "https://example.org/resource"

  - `identifier._system` (object)
    An extension object type #Element.

  - `identifier.value` (string)
    An extension object type #string.
    Example: "example-string"

  - `identifier._value` (object)
    An extension object type #Element.

  - `identifier.period` (object)
    An extension object type #Period.

  - `identifier.assigner` (object)
    An extension object type #Reference.

  - `type` (any)
    Indicates the purpose of this bundle - how it is intended to be used.
    Enum: "document", "message", "transaction", "transaction-response", "batch", "batch-response", "history", "searchset", "collection"

  - `_type` (object)
    Base definition for all elements in a resource.

  - `timestamp` (string)
    An instant in time - known at least to the second
    Example: "2024-01-01T00:00:00Z"

  - `_timestamp` (object)
    Base definition for all elements in a resource.

  - `total` (number)
    An integer with a value that is not negative (e.g. >= 0)

  - `_total` (object)
    Base definition for all elements in a resource.

  - `link` (array)
    A series of links that provide context to this bundle.
    Example: [{"relation":"search","url":"https://api.heydonto.com/fhir/code-system/?_count=20"},{"relation":"next","url":"https://api.heydonto.com/fhir/code-system/?_count=20&_page_token=TOKEN"},{"relation":"first","url":"https://api.heydonto.com/fhir/code-system/?_count=20"},{"relation":"self","url":"https://api.heydonto.com/fhir/code-system/?_count=20"}]

  - `link.modifierExtension` (array)
    May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

  - `link.relation` (string)
    An extension object type #string.
    Example: "example-string"

  - `link._relation` (object)
    An extension object type #Element.

  - `link.url` (string)
    An extension object type #uri.
    Example: "https://example.org/resource"

  - `link._url` (object)
    An extension object type #Element.

  - `entry` (array)
    An entry in a bundle resource - will either contain a resource or information about a resource (transactions and history only).
    Example: [{"resourceType":"CodeSystem","id":"example","meta":{"profile":["http://hl7.org/fhir/StructureDefinition/shareablecodesystem"]},"text":{"status":"generated","div":"<div xmlns=\"http://www.w3.org/1999/xhtml\">\n      <p>CodeSystem &quot;ACME Codes for Cholesterol&quot;: This is an example code system that includes \n        all the codes for serum cholesterol defined by ACME inc.</p>\n      <p>Developed by: FHIR project team (example)</p>\n      <p>Published for testing on 28-Jan 2016</p>\n      <p>This code system defines all the ACME codes for serum cholesterol:</p>\n      <table class=\"grid\">\n        <tr>\n          <td>\n            <b>Code</b>\n          </td>\n          <td>\n            <b>Display</b>\n          </td>\n          <td>\n            <b>Definition</b>\n          </td>\n        </tr>\n        <tr>\n          <td>chol-mmol</td>\n          <td>SChol (mmol/L)</td>\n          <td>Serum Cholesterol, in mmol/L</td>\n        </tr>\n        <tr>\n          <td>chol-mass</td>\n          <td>SChol (mg/L)</td>\n          <td>Serum Cholesterol, in mg/L</td>\n        </tr>\n        <tr>\n          <td>chol</td>\n          <td>SChol</td>\n          <td>Serum Cholesterol</td>\n        </tr>\n      </table>\n    </div>"},"url":"http://hl7.org/fhir/CodeSystem/example","identifier":[{"system":"http://acme.com/identifiers/codesystems","value":"internal-cholesterol-inl"}],"version":"20160128","name":"ACMECholCodesBlood","title":"ACME Codes for Cholesterol in Serum/Plasma","status":"draft","experimental":true,"date":"2016-01-28","publisher":"Acme Co","contact":[{"name":"FHIR project team","telecom":[{"system":"url","value":"http://hl7.org/fhir"}]}],"description":"This is an example code system that includes all the ACME codes for serum/plasma cholesterol from v2.36.","caseSensitive":true,"content":"complete","filter":[{"code":"acme-plasma","description":"An internal filter used to select codes that are only used with plasma","operator":["="],"value":"the value of this filter is either 'true' or 'false'"}],"concept":[{"code":"chol-mmol","display":"SChol (mmol/L)","definition":"Serum Cholesterol, in mmol/L","designation":[{"use":{"system":"http://acme.com/config/fhir/codesystems/internal","code":"internal-label"},"value":"From ACME POC Testing"}]},{"code":"chol-mass","display":"SChol (mg/L)","definition":"Serum Cholesterol, in mg/L","designation":[{"use":{"system":"http://acme.com/config/fhir/codesystems/internal","code":"internal-label"},"value":"From Paragon Labs"}]},{"code":"chol","display":"SChol","definition":"Serum Cholesterol","designation":[{"use":{"system":"http://acme.com/config/fhir/codesystems/internal","code":"internal-label"},"value":"Obdurate Labs uses this with both kinds of units..."}]}]}]

  - `entry.resourceType` (any, required)
    This is a CodeSystem resource
    Enum: "CodeSystem"

  - `entry.text` (object)
    A human-readable summary of the resource conveying the essential clinical and business information for the resource.

  - `entry.text.status` (any)
    The status of the narrative - whether it's entirely generated (from just the defined data or the extensions too), or whether a human authored it and it may contain additional data.
    Enum: "generated", "extensions", "additional", "empty"

  - `entry.text._status` (object)
    An extension object type #Element.

  - `entry.text.div` (string, required)
    An extension object type #xhtml.
    Example: "<div>Example</div>"

  - `entry.contained` (array)
    These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope.

  - `entry.extension` (array)
    May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

  - `entry.extension.valueBase64Binary` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "U2FtcGxl"

  - `entry.extension._valueBase64Binary` (object)
    An extension object type #Element.

  - `entry.extension.valueBoolean` (boolean)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: true

  - `entry.extension._valueBoolean` (object)
    An extension object type #Element.

  - `entry.extension.valueCanonical` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "http://example.org/Profile"

  - `entry.extension._valueCanonical` (object)
    An extension object type #Element.

  - `entry.extension.valueCode` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "sample-code"

  - `entry.extension._valueCode` (object)
    An extension object type #Element.

  - `entry.extension.valueDate` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "2024-01-01"

  - `entry.extension._valueDate` (object)
    An extension object type #Element.

  - `entry.extension.valueDateTime` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "2024-01-01T00:00:00Z"

  - `entry.extension._valueDateTime` (object)
    An extension object type #Element.

  - `entry.extension.valueDecimal` (number)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: 1.23

  - `entry.extension._valueDecimal` (object)
    An extension object type #Element.

  - `entry.extension.valueId` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "example-id"

  - `entry.extension._valueId` (object)
    An extension object type #Element.

  - `entry.extension.valueInstant` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "2024-01-01T00:00:00Z"

  - `entry.extension._valueInstant` (object)
    An extension object type #Element.

  - `entry.extension.valueInteger` (number)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: 1

  - `entry.extension._valueInteger` (object)
    An extension object type #Element.

  - `entry.extension.valueMarkdown` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "Sample markdown text"

  - `entry.extension._valueMarkdown` (object)
    An extension object type #Element.

  - `entry.extension.valueOid` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "urn:oid:1.2.3.4.5"

  - `entry.extension._valueOid` (object)
    An extension object type #Element.

  - `entry.extension.valuePositiveInt` (number)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: 1

  - `entry.extension._valuePositiveInt` (object)
    An extension object type #Element.

  - `entry.extension.valueString` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "example-string"

  - `entry.extension._valueString` (object)
    An extension object type #Element.

  - `entry.extension.valueTime` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "12:00:00"

  - `entry.extension._valueTime` (object)
    An extension object type #Element.

  - `entry.extension.valueUnsignedInt` (number)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).

  - `entry.extension._valueUnsignedInt` (object)
    An extension object type #Element.

  - `entry.extension.valueUri` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "https://example.org/resource"

  - `entry.extension._valueUri` (object)
    An extension object type #Element.

  - `entry.extension.valueUrl` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "https://example.org"

  - `entry.extension._valueUrl` (object)
    An extension object type #Element.

  - `entry.extension.valueUuid` (string)
    Value of extension - must be one of a constrained set of the data types (see [Extensibility](https://hl7.org/fhir/extensibility.html) for a list).
    Example: "urn:uuid:123e4567-e89b-12d3-a456-426614174000"

  - `entry.extension._valueUuid` (object)
    An extension object type #Element.

  - `entry.extension.valueAddress` (object)
    An extension object type #Address.

  - `entry.extension.valueAge` (object)
    An extension object type #Age.

  - `entry.extension.valueAnnotation` (object)
    An extension object type #Annotation.

  - `entry.extension.valueAttachment` (object)
    An extension object type #Attachment.

  - `entry.extension.valueCodeableConcept` (object)
    An extension object type #CodeableConcept.

  - `entry.extension.valueCoding` (object)
    An extension object type #Coding.

  - `entry.extension.valueContactPoint` (object)
    An extension object type #ContactPoint.

  - `entry.extension.valueCount` (object)
    An extension object type #Count.

  - `entry.extension.valueDistance` (object)
    An extension object type #Distance.

  - `entry.extension.valueDuration` (object)
    An extension object type #Duration.

  - `entry.extension.valueHumanName` (object)
    An extension object type #HumanName.

  - `entry.extension.valueIdentifier` (object)
    An extension object type #Identifier.

  - `entry.extension.valueMoney` (object)
    An extension object type #Money.

  - `entry.extension.valuePeriod` (object)
    An extension object type #Period.

  - `entry.extension.valueQuantity` (object)
    An extension object type #Quantity.

  - `entry.extension.valueRange` (object)
    An extension object type #Range.

  - `entry.extension.valueRatio` (object)
    An extension object type #Ratio.

  - `entry.extension.valueReference` (object)
    An extension object type #Reference.

  - `entry.extension.valueSampledData` (object)
    An extension object type #SampledData.

  - `entry.extension.valueSignature` (object)
    An extension object type #Signature.

  - `entry.extension.valueTiming` (object)
    An extension object type #Timing.

  - `entry.extension.valueContactDetail` (object)
    An extension object type #ContactDetail.

  - `entry.extension.valueContributor` (object)
    An extension object type #Contributor.

  - `entry.extension.valueDataRequirement` (object)
    An extension object type #DataRequirement.

  - `entry.extension.valueExpression` (object)
    An extension object type #Expression.

  - `entry.extension.valueParameterDefinition` (object)
    An extension object type #ParameterDefinition.

  - `entry.extension.valueRelatedArtifact` (object)
    An extension object type #RelatedArtifact.

  - `entry.extension.valueTriggerDefinition` (object)
    An extension object type #TriggerDefinition.

  - `entry.extension.valueUsageContext` (object)
    An extension object type #UsageContext.

  - `entry.extension.valueDosage` (object)
    An extension object type #Dosage.

  - `entry.extension.valueMeta` (object)
    An extension object type #Meta.

  - `entry.modifierExtension` (array)
    May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

  - `entry.url` (string)
    String of characters used to identify a name or a resource
    Example: "https://example.org/resource"

  - `entry._url` (object)
    Base definition for all elements in a resource.

  - `entry.identifier` (array)
    A formal identifier that is used to identify this code system when it is represented in other formats, or referenced in a specification, model, design or an instance.
    Example: [{"system":"http://acme.com/identifiers/codesystems","value":"internal-cholesterol-inl"}]

  - `entry.version` (string)
    A sequence of Unicode characters
    Example: "example-string"

  - `entry._version` (object)
    Base definition for all elements in a resource.

  - `entry.name` (string)
    A sequence of Unicode characters
    Example: "example-string"

  - `entry._name` (object)
    Base definition for all elements in a resource.

  - `entry.title` (string)
    A sequence of Unicode characters
    Example: "example-string"

  - `entry._title` (object)
    Base definition for all elements in a resource.

  - `entry.status` (any)
    The date (and optionally time) when the code system resource was created or revised.
    Enum: "draft", "active", "retired", "unknown"

  - `entry._status` (object)
    Base definition for all elements in a resource.

  - `entry.experimental` (boolean)
    Value of "true" or "false"
    Example: true

  - `entry._experimental` (object)
    Base definition for all elements in a resource.

  - `entry.date` (string)
    A date, date-time or partial date (e.g. just year or year + month).  If hours and minutes are specified, a time zone SHALL be populated. The format is a union of the schema types gYear, gYearMonth, date and dateTime. Seconds must be provided due to schema type constraints but may be zero-filled and may be ignored.                 Dates SHALL be valid dates.
    Example: "2024-01-01T00:00:00Z"

  - `entry._date` (object)
    Base definition for all elements in a resource.

  - `entry.publisher` (string)
    A sequence of Unicode characters
    Example: "example-string"

  - `entry._publisher` (object)
    Base definition for all elements in a resource.

  - `entry.contact` (array)
    Contact details to assist a user in finding and communicating with the publisher.
    Example: [{"name":"FHIR project team","telecom":[{"system":"url","value":"http://hl7.org/fhir"}]}]

  - `entry.contact.name` (string)
    An extension object type #string.
    Example: "example-string"

  - `entry.contact._name` (object)
    An extension object type #Element.

  - `entry.contact.telecom` (array)
    The contact details for the individual (if a name was provided) or the organization.

  - `entry.description` (string)
    A string that may contain Github Flavored Markdown syntax for optional processing by a mark down presentation engine
    Example: "Sample markdown text"

  - `entry._description` (object)
    Base definition for all elements in a resource.

  - `entry.useContext` (array)
    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 code system instances.

  - `entry.useContext.code` (object, required)
    An extension object type #Coding.

  - `entry.jurisdiction` (array)
    A legal or geographic region in which the code system is intended to be used.

  - `entry.jurisdiction.coding` (array)
    A reference to a code defined by a terminology system.

  - `entry.jurisdiction.text` (string)
    An extension object type #string.
    Example: "example-string"

  - `entry.jurisdiction._text` (object)
    An extension object type #Element.

  - `entry.purpose` (string)
    A string that may contain Github Flavored Markdown syntax for optional processing by a mark down presentation engine
    Example: "Sample markdown text"

  - `entry._purpose` (object)
    Base definition for all elements in a resource.

  - `entry.copyright` (string)
    A string that may contain Github Flavored Markdown syntax for optional processing by a mark down presentation engine
    Example: "Sample markdown text"

  - `entry._copyright` (object)
    Base definition for all elements in a resource.

  - `entry.caseSensitive` (boolean)
    Value of "true" or "false"
    Example: true

  - `entry._caseSensitive` (object)
    Base definition for all elements in a resource.

  - `entry.valueSet` (string)
    A URI that is a reference to a canonical URL on a FHIR resource
    Example: "http://example.org/Profile"

  - `entry.hierarchyMeaning` (any)
    The meaning of the hierarchy of concepts as represented in this resource.
    Enum: "grouped-by", "is-a", "part-of", "classified-with"

  - `entry._hierarchyMeaning` (object)
    Base definition for all elements in a resource.

  - `entry.compositional` (boolean)
    Value of "true" or "false"
    Example: true

  - `entry._compositional` (object)
    Base definition for all elements in a resource.

  - `entry.versionNeeded` (boolean)
    Value of "true" or "false"
    Example: true

  - `entry._versionNeeded` (object)
    Base definition for all elements in a resource.

  - `entry.content` (any)
    The extent of the content of the code system (the concepts and codes it defines) are represented in this resource instance.
    Enum: "not-present", "example", "fragment", "complete", "supplement"

  - `entry._content` (object)
    Base definition for all elements in a resource.

  - `entry.supplements` (string)
    A URI that is a reference to a canonical URL on a FHIR resource
    Example: "http://example.org/Profile"

  - `entry.count` (number)
    An integer with a value that is not negative (e.g. >= 0)

  - `entry._count` (object)
    Base definition for all elements in a resource.

  - `entry.filter` (array)
    A filter that can be used in a value set compose statement when selecting concepts using a filter.
    Example: [{"code":"acme-plasma","description":"An internal filter used to select codes that are only used with plasma","operator":["="],"value":"the value of this filter is either 'true' or 'false'"}]

  - `entry.filter.code` (string)
    An extension object type #code.
    Example: "sample-code"

  - `entry.filter._code` (object)
    An extension object type #Element.

  - `entry.filter.description` (string)
    An extension object type #string.
    Example: "example-string"

  - `entry.filter._description` (object)
    An extension object type #Element.

  - `entry.filter.operator` (array)
    A list of operators that can be used with the filter.
    Example: ["sample-code"]

  - `entry.filter._operator` (array)
    Extensions for operator

  - `entry.property` (array)
    A property defines an additional slot through which additional information can be provided about a concept.

  - `entry.property.uri` (string)
    An extension object type #uri.
    Example: "https://example.org/resource"

  - `entry.property._uri` (object)
    An extension object type #Element.

  - `entry.property.type` (any)
    The type of the property value. Properties of type "code" contain a code defined by the code system (e.g. a reference to another defined concept).
    Enum: "code", "Coding", "string", "integer", "boolean", "dateTime", "decimal"

  - `entry.property._type` (object)
    An extension object type #Element.

  - `entry.concept` (array)
    Concepts that are in the code system. The concept definitions are inherently hierarchical, but the definitions must be consulted to determine what the meanings of the hierarchical relationships are.
    Example: [{"code":"chol-mmol","display":"SChol (mmol/L)","definition":"Serum Cholesterol, in mmol/L","designation":[{"use":{"system":"http://acme.com/config/fhir/codesystems/internal","code":"internal-label"},"value":"From ACME POC Testing"}]},{"code":"chol-mass","display":"SChol (mg/L)","definition":"Serum Cholesterol, in mg/L","designation":[{"use":{"system":"http://acme.com/config/fhir/codesystems/internal","code":"internal-label"},"value":"From Paragon Labs"}]},{"code":"chol","display":"SChol","definition":"Serum Cholesterol","designation":[{"use":{"system":"http://acme.com/config/fhir/codesystems/internal","code":"internal-label"},"value":"Obdurate Labs uses this with both kinds of units..."}]}]

  - `entry.concept.display` (string)
    An extension object type #string.
    Example: "example-string"

  - `entry.concept._display` (object)
    An extension object type #Element.

  - `entry.concept.definition` (string)
    An extension object type #string.
    Example: "example-string"

  - `entry.concept._definition` (object)
    An extension object type #Element.

  - `entry.concept.designation` (array)
    Additional representations for the concept - other languages, aliases, specialized purposes, used for particular purposes, etc.

  - `entry.concept.property` (array)
    A property value for this concept.

  - `entry.concept.concept` (array)
    Defines children of a concept to produce a hierarchy of concepts. The nature of the relationships is variable (is-a/contains/categorizes) - see hierarchyMeaning.

  - `signature` (object)
    A signature along with supporting context. The signature may be a digital signature that is cryptographic in nature, or some other signature acceptable to the domain. This other signature may be as simple as a graphical image representing a hand-written signature, or a signature ceremony Different signature approaches have different utilities.

  - `signature.type` (array, required)
    An indication of the reason that the entity signed this document. This may be explicitly included as part of the signature information and can be used when determining accountability for various actions concerning the document.

  - `signature.when` (object)
    An extension object type #instant.

  - `signature._when` (object)
    An extension object type #Element.

  - `signature.who` (object, required)
    An extension object type #Reference.

  - `signature.onBehalfOf` (object)
    An extension object type #Reference.

  - `signature.targetFormat` (string)
    An extension object type #code.
    Example: "sample-code"

  - `signature._targetFormat` (object)
    An extension object type #Element.

  - `signature.sigFormat` (string)
    An extension object type #code.
    Example: "sample-code"

  - `signature._sigFormat` (object)
    An extension object type #Element.

  - `signature.data` (string)
    An extension object type #base64Binary.
    Example: "U2FtcGxl"

  - `signature._data` (object)
    An extension object type #Element.

## Response 401 fields (application/json):

  - `message` (string, required)
    Error message indicating unauthorized access.
    Example: "Unauthorized"

  - `statusCode` (number, required)
    HTTP status code for unauthorized access.
    Example: 401