description: This extension defines a possible search parameter combination by listing a set of search parameters and indicating whether they are required or optional.\n- If a search combination is specified, clients should expect that they must submit a search that meets one of the required combinations or the search will be unsuccessful.\n- If multiple search parameter combinations are specified, a client may pick between them, and supply the minimal required parameters for any of the combinations.\n- If no parameters in the set of search parameters are listed as required, then *at least one* of the listed optional parameters must be present.  This shorthand method is the same as repeating the entire extension for each combination of optional and required search parameters.
package_name: hl7.fhir.uv.extensions.r4
derivation: constraint
name: CSSearchParameterCombination
type: Extension
elements:
  extension:
    isModifier: false
    short: A required search parameter name
    type: Extension
    array: true
    index: 0
    slicing:
      slices:
        required:
          match: {}
          schema:
            isModifier: false
            short: A required search parameter name
            type: Extension
            array: true
            index: 0
            extensions: {}
            elements:
              extension: {index: 1}
              url:
                type: uri
                pattern: {type: Uri, value: required}
                index: 2
              value:
                choices: [valueString]
                index: 4
              valueString: {type: string, choiceOf: value, index: 5}
            required: [valueString, value]
        optional:
          match: {}
          schema:
            isModifier: false
            short: An optional search parameter name
            type: Extension
            array: true
            index: 6
            extensions: {}
            elements:
              extension: {index: 7}
              url:
                type: uri
                pattern: {type: Uri, value: optional}
                index: 8
              value:
                choices: [valueString]
                index: 10
              valueString: {type: string, choiceOf: value, index: 11}
            required: [valueString, value]
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/capabilitystatement-search-parameter-combination'}
    index: 12
  value:
    choices: []
    index: 14
package_version: 1.0.0
extensions:
  required:
    isModifier: false
    short: A required search parameter name
    index: 0
    type: Extension
    array: true
    elements:
      extension: {index: 1}
      url:
        type: uri
        pattern: {type: Uri, value: required}
        index: 2
      value:
        choices: [valueString]
        index: 4
      valueString: {type: string, choiceOf: value, index: 5}
    extensions: {}
    url: null
    required: [valueString, value]
  optional:
    isModifier: false
    short: An optional search parameter name
    index: 6
    type: Extension
    array: true
    elements:
      extension: {index: 7}
      url:
        type: uri
        pattern: {type: Uri, value: optional}
        index: 8
      value:
        choices: [valueString]
        index: 10
      valueString: {type: string, choiceOf: value, index: 11}
    extensions: {}
    url: null
    required: [valueString, value]
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/capabilitystatement-search-parameter-combination
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 1.0.0