{

"resourceType": "CodeSystem",
"id": "vision-base-codes",
"meta": {
  "lastUpdated": "2019-11-01T09:29:23.356+11:00"
},
"extension": [
  {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode": "fm"
  },
  {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode": "trial-use"
  },
  {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 2
  }
],
"url": "http://hl7.org/fhir/vision-base-codes",
"identifier": [
  {
    "system": "urn:ietf:rfc:3986",
    "value": "urn:oid:2.16.840.1.113883.4.642.4.663"
  }
],
"version": "4.0.1",
"name": "VisionBase",
"title": "VisionBase",
"status": "draft",
"experimental": false,
"date": "2019-11-01T09:29:23+11:00",
"publisher": "HL7 (FHIR Project)",
"contact": [
  {
    "telecom": [
      {
        "system": "url",
        "value": "http://hl7.org/fhir"
      },
      {
        "system": "email",
        "value": "fhir@lists.hl7.org"
      }
    ]
  }
],
"description": "A coded concept listing the base codes.",
"caseSensitive": true,
"valueSet": "http://hl7.org/fhir/ValueSet/vision-base-codes",
"content": "complete",
"concept": [
  {
    "code": "up",
    "display": "Up",
    "definition": "top."
  },
  {
    "code": "down",
    "display": "Down",
    "definition": "bottom."
  },
  {
    "code": "in",
    "display": "In",
    "definition": "inner edge."
  },
  {
    "code": "out",
    "display": "Out",
    "definition": "outer edge."
  }
]

}