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Filter ​

In the CRTDL date and token are supported as filter types. For all filters, the name field in the CRTDL corresponds to the code field in a FHIR Search parameter, which identifies how the filter should be applied.

Date Filter ​

The date filter allows you to specify a date range for filtering resources. It can be used to include or exclude resources based on their date attributes.

json
{
  "type": "date",
  "name": "dateFilter",
  "parameters": {
    "start": "2023-01-01",
    "end": "2023-12-31"
  }
}

The start and end parameters define the range of dates to filter resources only allow a day wise granularity.

Token Filter ​

Token filters allow you to filter resources based on specific codes or identifiers. This is useful for filtering resources by specific concepts, such as LOINC codes or SNOMED codes.

json
{
  "type": "token",
  "name": "codeFilter",
  "parameters": {
    "system": "http://loinc.org",
    "code": "12345-6"
  }
}

The system parameter specifies the coding system (e.g., LOINC, SNOMED), and the code parameter specifies the specific code to filter by.