A supported modifier for a search parameter.
This code system http://hl7.org/fhir/search-modifier-code defines the following codes:
Code Display Definition Copy
missing Missing The search parameter returns resources that have a value or not. btn btn
exact Exact The search parameter returns resources that have a value that exactly matches the supplied parameter (the whole string, including casing and accents). btn btn
contains Contains The search parameter returns resources that include the supplied parameter value anywhere within the field being searched. btn btn
not Not The search parameter returns resources that do not contain a match. btn btn
text Text The search parameter is processed as a string that searches text associated with the code/value - either CodeableConcept.text, Coding.display, Identifier.type.text, or Reference.display. btn btn
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. btn btn
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. btn btn
below Below The search parameter tests whether the value in a resource is subsumed by the specified value (is-a, or hierarchical relationships). btn btn
above Above The search parameter tests whether the value in a resource subsumes the specified value (is-a, or hierarchical relationships). btn btn
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.). btn btn
identifier Identifier The search parameter applies to the identifier on the resource, not the reference. btn btn
of-type Of Type The search parameter has the format system|code|value, where the system and code refer to an Identifier.type.coding.system and .code, and match if any of the type codes match. All 3 parts must be present. btn btn
code-text Code Text Tests whether the textual display value in a resource (e.g., CodeableConcept.text, Coding.display, or Reference.display) matches the supplied parameter value. btn btn
text-advanced Text Advanced Tests whether the value in a resource matches the supplied parameter value using advanced text handling that searches text associated with the code/value - e.g., CodeableConcept.text, Coding.display, or Identifier.type.text. btn btn
iterate Iterate The search parameter indicates an inclusion directive (_include, _revinclude) that is applied to an included resource instead of the matching resource. btn btn
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). If the code is in italics, this indicates that the code is not selectable ('Abstract')