> ## Documentation Index
> Fetch the complete documentation index at: https://docs.metriport.com/llms.txt
> Use this file to discover all available pages before exploring further.

# DataRequirement

> Base StructureDefinition for DataRequirement Type: Describes a required data item for evaluation in terms of the type of data, and optional code or date-based filters of the data.

## Properties

| Name          | Required | Type                                                                                                                    | Description                                                                       |
| ------------- | -------- | ----------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------- |
| id            | No       | string                                                                                                                  | Unique id for inter-element referencing                                           |
| extension     | No       | [Extension](/medical-api/fhir/data-types/extension)\[]                                                                  | Additional content defined by implementations                                     |
| type          | Yes      | code                                                                                                                    | The type of the required data                                                     |
| profile       | No       | canonical\[]                                                                                                            | The profile of the required data                                                  |
| subject\[x]   | No       | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept), Reference\<[Group](/medical-api/fhir/resources/group)> | E.g. Patient, Practitioner, RelatedPerson, Organization, Location, Device         |
| mustSupport   | No       | string\[]                                                                                                               | Indicates specific structure elements that are referenced by the knowledge module |
| codeFilter    | No       | Element\[]                                                                                                              | What codes are expected                                                           |
| - id          | No       | string                                                                                                                  | Unique id for inter-element referencing                                           |
| - extension   | No       | [Extension](/medical-api/fhir/data-types/extension)\[]                                                                  | Additional content defined by implementations                                     |
| - path        | No       | string                                                                                                                  | A code-valued attribute to filter on                                              |
| - searchParam | No       | string                                                                                                                  | A coded (token) parameter to search on                                            |
| - valueSet    | No       | canonical                                                                                                               | Valueset for the filter                                                           |
| - code        | No       | [Coding](/medical-api/fhir/data-types/coding)\[]                                                                        | What code is expected                                                             |
| dateFilter    | No       | Element\[]                                                                                                              | What dates/date ranges are expected                                               |
| - id          | No       | string                                                                                                                  | Unique id for inter-element referencing                                           |
| - extension   | No       | [Extension](/medical-api/fhir/data-types/extension)\[]                                                                  | Additional content defined by implementations                                     |
| - path        | No       | string                                                                                                                  | A date-valued attribute to filter on                                              |
| - searchParam | No       | string                                                                                                                  | A date valued parameter to search on                                              |
| - value\[x]   | No       | dateTime, [Period](/medical-api/fhir/data-types/period), [Duration](/medical-api/fhir/data-types/duration)              | The value of the filter, as a Period, DateTime, or Duration value                 |
| limit         | No       | positiveInt                                                                                                             | Number of results                                                                 |
| sort          | No       | Element\[]                                                                                                              | Order of the results                                                              |
| - id          | No       | string                                                                                                                  | Unique id for inter-element referencing                                           |
| - extension   | No       | [Extension](/medical-api/fhir/data-types/extension)\[]                                                                  | Additional content defined by implementations                                     |
| - path        | Yes      | string                                                                                                                  | The name of the attribute to perform the sort                                     |
| - direction   | Yes      | code                                                                                                                    | ascending / descending                                                            |