HL7 Terminology (THO)
7.2.0 - Publication International flag

This page is part of the HL7 Terminology (v7.2.0: Release) based on FHIR (HL7® FHIR® Standard) v5.0.0. This is the current published version. For a full list of available versions, see the Directory of published versions

: Evidence Variable Constraint

Active as of 2026-05-04 Maturity Level: 1

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{
  "resourceType" : "CodeSystem",
  "id" : "evidence-variable-constraint",
  "meta" : {
    "profile" : [
      🔗 "http://hl7.org/fhir/StructureDefinition/shareablecodesystem"
    ]
  },
  "language" : "en",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem evidence-variable-constraint</b></p><a name=\"evidence-variable-constraint\"> </a><a name=\"hcevidence-variable-constraint\"> </a><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\"/><p style=\"margin-bottom: 0px\">Profile: <a href=\"http://hl7.org/fhir/R5/shareablecodesystem.html\">Shareable CodeSystem</a></p></div><p>This case-sensitive code system <code>http://terminology.hl7.org/CodeSystem/evidence-variable-constraint</code> defines the following codes:</p><table class=\"codes\"><tr><td style=\"white-space:nowrap\"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style=\"white-space:nowrap\">alphanumeric-only<a name=\"evidence-variable-constraint-alphanumeric-only\"> </a></td><td>Alphanumeric Characters Only</td><td>String values that are restricted to only numbers and letters [A-Za-z0-9].</td></tr><tr><td style=\"white-space:nowrap\">alphanumeric-space-only<a name=\"evidence-variable-constraint-alphanumeric-space-only\"> </a></td><td>Alphanumeric and Space Characters Only</td><td>String values that are restricted to only numbers, letters, and spaces [A-Za-z0-9\\s].</td></tr><tr><td style=\"white-space:nowrap\">range-zero-to-one<a name=\"evidence-variable-constraint-range-zero-to-one\"> </a></td><td>Range Zero to One</td><td>Numeric value between 0 and 1, inclusive.</td></tr></table></div>"
  },
  "extension" : [
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode" : "cds"
    },
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger" : 1
    }
  ],
  "url" : "http://terminology.hl7.org/CodeSystem/evidence-variable-constraint",
  "version" : "1.0.0",
  "name" : "EvidenceVariableConstraint",
  "title" : "Evidence Variable Constraint",
  "status" : "active",
  "experimental" : false,
  "date" : "2026-05-04T16:55:11+11:00",
  "publisher" : "HL7 (FHIR Project)",
  "contact" : [
    {
      "telecom" : [
        {
          "system" : "url",
          "value" : "http://hl7.org/fhir"
        },
        {
          "system" : "email",
          "value" : "fhir@lists.hl7.org"
        }
      ]
    }
  ],
  "description" : "A rule or other expectation for data values.",
  "caseSensitive" : true,
  "valueSet" : "http://terminology.hl7.org/ValueSet/evidence-variable-constraint",
  "content" : "complete",
  "concept" : [
    {
      "code" : "alphanumeric-only",
      "display" : "Alphanumeric Characters Only",
      "definition" : "String values that are restricted to only numbers and letters [A-Za-z0-9]."
    },
    {
      "code" : "alphanumeric-space-only",
      "display" : "Alphanumeric and Space Characters Only",
      "definition" : "String values that are restricted to only numbers, letters, and spaces [A-Za-z0-9\\s]."
    },
    {
      "code" : "range-zero-to-one",
      "display" : "Range Zero to One",
      "definition" : "Numeric value between 0 and 1, inclusive."
    }
  ]
}