This page is part of the FHIR Specification (v1.4.0: STU 3 Ballot 3). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions
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1.30.1.11.92 Code System http://hl7.org/fhir/search-modifier-code 
This is a value set defined by the FHIR project.
Summary
| Defining URL: | http://hl7.org/fhir/search-modifier-code |
| Name: | SearchModifierCode |
| Definition: | A supported modifier for a search parameter. |
| Committee: | FHIR Infrastructure Work Group |
| OID: | 2.16.840.1.113883.4.642.1.92 (for OID based terminology systems) |
| Source Resource | XML / JSON |
This Code system is used in the following value sets:
1.30.1.11.92.1 Content 
1.30.1.11.92.2 SearchModifierCode 
A supported modifier for a search parameter.
This code system http://hl7.org/fhir/search-modifier-code defines the following codes:
| Code | Display | Definition |
| missing | Missing | The search parameter returns resources that have a value or not. |
| exact | Exact | The search parameter returns resources that have a value that exactly matches the supplied parameter (the whole string, including casing and accents). |
| contains | Contains | The search parameter returns resources that include the supplied parameter value anywhere within the field being searched. |
| not | Not | The search parameter returns resources that do not contain a match . |
| text | Text | The search parameter is processed as a string that searches text associated with the code/value - either CodeableConcept.text, Coding.display, or Identifier.type.text. |
| in | In | The search parameter is a URI (relative or absolute) that identifies a value set, and the search parameter tests whether the coding is in the specified value set. |
| not-in | Not In | The search parameter is a URI (relative or absolute) that identifies a value set, and the search parameter tests whether the coding is not in the specified value set. |
| below | Below | The search parameter tests whether the value in a resource is subsumed by the specified value (is-a, or hierarchical relationships). |
| above | Above | The search parameter tests whether the value in a resource subsumes the specified value (is-a, or hierarchical relationships). |
| type | Type | The search parameter only applies to the Resource Type specified as a modifier (e.g. the modifier is not actually :type, but :Patient etc.). |
See the full registry of value sets defined as part of FHIR.
Explanation of the columns that may appear on this page:
| Level | A few code lists that FHIR defines are hierarchical - each code is assigned a level.
In this scheme, some codes are under other codes, and imply that the code they are under also applies |
| Source | The source of the definition of the code (when the value set draws in codes defined elsewhere) |
| Code | The code (used as the code in the resource instance) |
| Display | The display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application |
| Definition | An explanation of the meaning of the concept |
| Comments | Additional notes about how to use the code |