CodeSystem Code Composition

Overview
Given a set of properties, return one or more possible matching codes. For more details see official FHIR terminology documentation CodeSystem Code Composition​
$compose may return  3 possible types of match
complete match - a code that represents all the provided properties correctly
partial match - a code that represents some of the provided properties correctly, and not others
possible match - code that may represent the provided properties closely,
When send exact parameter is true - $compose operation return only complete and partial matches. When exact is false - $compose include in to response possible matches. Default value is true, that means, that by default returning only complete and partial matches.
 Api
GET/POST URL: [base]/ValueSet/$compose
GET/POST URL: [base]/ValueSet/[id]/$compose
Parameters
Parameter
Type
Status
Example
system
​uri​
supported
​property​
version
​string​
not supported
​
exact
​boolean​
supported
​exact​
property
​
supported
​property​
property.code
​code​
supported
​
property.value
code | Coding | string | 
integer | boolean | dateTime
supported
​
property.subproperty
​
not supported
​
property.subproperty.code
​code​
not supported
​
property.subproperty.value
code | Coding | string | 
integer | boolean | dateTime
not supported
​
compositional
​boolean​
not supported
​
property
One or more properties that contain information to be composed into the code.
Example:  Compose from system http://hl7.org/fhir/goal-status  where code is proposed
Request
Response
POST [BASE]/CodeSystem/$compose
{ 
  "resourceType" : "Parameters",
  "parameter" : [
     {
      "name" : "system",
      "valueUri" : "http://hl7.org/fhir/goal-status"
    },
    {
      "name" : "exact",
      "valueUri" : true
    },
    {
     	"name": "property",
     	"part": [
     		{
     			"name": "code",
     		    "valueCode": "code"
            },
            {
            	"name": "value",
            	"valueString": "proposed"
            }]
    }
  ]
}
{
    "resourceType": "Parameters",
    "parameter": [
        {
            "name": "match",
            "part": [
                {
                    "name": "code",
                    "valueCoding": {
                        "code": "proposed",
                        "module": "fhir-3.3.0",
                        "system": "http://hl7.org/fhir/goal-status",
                        "display": "Proposed",
                        "definition": "A goal is proposed for this patient"
                    }
                }
            ]
        }
    ]
}
Example:  Compose from system http://hl7.org/fhir/goal-status  where code is proposed or accepted 
Request
Response
POST [BASE]/CodeSystem/$compose
{ 
  "resourceType" : "Parameters",
  "parameter" : [
     {
      "name" : "system",
      "valueUri" : "http://hl7.org/fhir/goal-status"
    },
    {
      "name" : "exact",
      "valueUri" : true
    },
    {
     	"name": "property",
     	"part": [
     		{
     			"name": "code",
     		    "valueCode": "code"
            },
            {
            	"name": "value",
            	"valueString": "proposed"
            },
            {
            	"name": "value",
            	"valueString": "accepted"
            }]
    }
  ]
}
{
    "resourceType": "Parameters",
    "parameter": [
        {
            "name": "match",
            "part": [
                {
                    "name": "code",
                    "valueCoding": {
                        "code": "accepted",
                        "module": "fhir-3.3.0",
                        "system": "http://hl7.org/fhir/goal-status",
                        "display": "Accepted",
                        "definition": "A proposed goal was accepted or acknowledged"
                    }
                },
                {
                    "name": "code",
                    "valueCoding": {
                        "code": "proposed",
                        "module": "fhir-3.3.0",
                        "system": "http://hl7.org/fhir/goal-status",
                        "display": "Proposed",
                        "definition": "A goal is proposed for this patient"
                    }
                }
            ]
        }
    ]
}
Example:  Compose from system http://hl7.org/fhir/goal-status  where code is proposed or accepted and/or where definition is Planned 
Request
Response
POST [BASE]/CodeSystem/$compose
{ 
  "resourceType" : "Parameters",
  "parameter" : [
     {
      "name" : "system",
      "valueUri" : "http://hl7.org/fhir/goal-status"
    },
    {
      "name" : "exact",
      "valueUri" : true
    },
    {
     	"name": "property",
     	"part": [
     		{
     			"name": "code",
     		    "valueCode": "code"
            },
            {
            	"name": "value",
            	"valueString": "proposed"
            },
            {
            	"name": "value",
            	"valueString": "accepted"
            }]
    },
    {
     	"name": "property",
     	"part": [
     		{
     			"name": "code",
     		    "valueCode": "display"
            },
            {
            	"name": "value",
            	"valueString": "Planned"
            }]
    }
  ]
}
{
    "resourceType": "Parameters",
    "parameter": [
        {
            "name": "match",
            "part": [
                {
                    "name": "code",
                    "valueCoding": {
                        "code": "accepted",
                        "module": "fhir-3.3.0",
                        "system": "http://hl7.org/fhir/goal-status",
                        "display": "Accepted",
                        "definition": "A proposed goal was accepted or acknowledged"
                    }
                },
                {
                    "name": "code",
                    "valueCoding": {
                        "code": "proposed",
                        "module": "fhir-3.3.0",
                        "system": "http://hl7.org/fhir/goal-status",
                        "display": "Proposed",
                        "definition": "A goal is proposed for this patient"
                    }
                },
                {
                    "name": "code",
                    "valueCoding": {
                        "code": "planned",
                        "module": "fhir-3.3.0",
                        "system": "http://hl7.org/fhir/goal-status",
                        "display": "Planned",
                        "hierarchy": [
                            "accepted"
                        ],
                        "definition": "A goal is planned for this patient"
                    }
                }
            ]
        }
    ]
}
exact
Whether the operation is being used by a human, or a machine. When false include to response possible matches.
Example: lets try to compose code system from concepts where code contains on-
Request
Response
POST [BASE]/CodeSystem/$compose
{ 
  "resourceType" : "Parameters",
  "parameter" : [
     {
      "name" : "system",
      "valueUri" : "http://hl7.org/fhir/goal-status"
    },
    {
      "name" : "exact",
      "valueUri" : false
    },
    {
     	"name": "property",
     	"part": [
     		{
     			"name": "code",
     		    "valueCode": "code"
            },
            {
            	"name": "value",
            	"valueString": "on-"
            }]
    }
  ]
}
{
    "resourceType": "Parameters",
    "parameter": [
        {
            "name": "match",
            "part": [
                {
                    "name": "code",
                    "valueCoding": {
                        "code": "on-target",
                        "module": "fhir-3.3.0",
                        "system": "http://hl7.org/fhir/goal-status",
                        "display": "On Target",
                        "hierarchy": [
                            "accepted",
                            "in-progress"
                        ],
                        "definition": "The goal is on schedule for the planned timelines"
                    }
                },
                {
                    "name": "code",
                    "valueCoding": {
                        "code": "on-hold",
                        "module": "fhir-3.3.0",
                        "system": "http://hl7.org/fhir/goal-status",
                        "display": "On Hold",
                        "hierarchy": [
                            "accepted"
                        ],
                        "definition": "The goal remains a long term objective but is no longer being actively pursued for a temporary period of time."
                    }
                }
            ]
        }
    ]
}
​
CodeSystem Subsumption testing
ValueSet
Last updated 6 months ago
Parameter	Type	Status	Example
system	uri	`supported`	property
version	string	`not supported`
exact	boolean	`supported`	exact
property		`supported`	property
property.code	code	`supported`
property.value	code \| Coding \| string \| integer \| boolean \| dateTime	`supported`
property.subproperty		`not supported`
property.subproperty.code	code	`not supported`
property.subproperty.value	code \| Coding \| string \| integer \| boolean \| dateTime	`not supported`
compositional	boolean	`not supported`