CQL to ELM Translation Service

A microservice wrapper for the CQL to ELM conversion library.

Build:

mvn package

Execute via the command line:

java -jar target/cqlTranslationServer-1.4.9-jar-with-dependencies.jar

Simple Request

Example usage via HTTP request:

POST /cql/translator HTTP/1.1
Content-Type: application/cql
Accept: application/elm+json
Host: localhost:8080
Connection: close
Content-Length: 610

library CMS146 version '2'

using QUICK

valueset "Acute Pharyngitis": '2.16.840.1.113883.3.464.1003.102.12.1011'
...

Will return:

HTTP/1.1 200 OK
Content-Type: application/elm+json
Date: Wed, 10 Feb 2016 22:15:33 GMT
Connection: close
Content-Length: 6932

{
  "library": {
    "identifier": {
      "id": "CMS146",
      "version": "2"
    },
    "usings": {"def": [
      {
        "localIdentifier": "System",
        "uri": "urn:hl7-org:elm-types:r1"
      },
      {
        "localId": "1",
        "localIdentifier": "QUICK",
        "uri": "http://hl7.org/fhir"
      }
    ]},
    "valueSets": {"def": [{
      "localId": "2",
      "name": "Acute Pharyngitis",
      "id": "2.16.840.1.113883.3.464.1003.102.12.1011",
      "accessLevel": "Public"
    },...]},
    ...
  }
}

Multipart Request

The service also supports POST of multiple CQL libraries packaged as multipart/form-data. The result will be a similar package with one ELM part for each CQL part in the submitted package.

Example usage via HTTP request:

POST /cql/translator HTTP/1.1
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
Accept: multipart/form-data
Host: localhost:8080
content-length: 545
Connection: keep-alive

------WebKitFormBoundary7MA4YWxkTrZu0gW--,
Content-Disposition: form-data; name="HelloWorld"

library HelloWorld version '1.0.0'

using QDM

include Speaker version '1.0.0' called Speaker

define Hello: 'World'

define SpeakerName: Speaker.Name
------WebKitFormBoundary7MA4YWxkTrZu0gW--
Content-Disposition: form-data; name="Speaker"

library Speaker version '1.0.0'

using QDM

define Name: 'Bob'
------WebKitFormBoundary7MA4YWxkTrZu0gW--

Will return:

HTTP/1.1 200
status: 200
MIME-Version: 1.0
Content-Type: multipart/form-data;boundary=Boundary_2_526521536_1556163069788
Date: Thu, 25 Apr 2019 03:47:49 GMT
Content-Length: 2365

--Boundary_2_526521536_1556163069788
Content-Type: application/elm+json
Content-Disposition: form-data; name="HelloWorld"

{
  "library" : {
      "identifier" : {
        "id" : "HelloWorld",
        "version" : "1.0.0"
      },
      "schemaIdentifier" : {
        "id" : "urn:hl7-org:elm",
        "version" : "r1"
      },
      ...
  }
}
--Boundary_2_526521536_1556163069788
Content-Type: application/elm+json
Content-Disposition: form-data; name="Speaker"

{
  "library" : {
      "identifier" : {
        "id" : "Speaker",
        "version" : "1.0.0"
      },
      "schemaIdentifier" : {
        "id" : "urn:hl7-org:elm",
        "version" : "r1"
      },
      ...
  }
}
--Boundary_2_526521536_1556163069788--

CQL-to-ELM Options

The CQL-to-ELM translator supports many options to control the output. These options can be passed to the service as query parameters when you post CQL to the service (e.g., POST http://localhost:8080/cql/translator?annotations=true&result-types=true). These query parameters are supported for both simple requests and multipart requests. See the table below for the available options:

Option	Values	Default
date-range-optimization	true|false	false
annotations	true|false	false
locators	true|false	false
result-types	true|false	false
signatures	None|Differing|Overloads|All	None
detailed-errors	true|false	false
disable-list-traversal	true|false	false
disable-list-demotion	true|false	false
disable-list-promotion	true|false	false
enable-interval-demotion	true|false	false
enable-interval-promotion	true|false	false
disable-method-invocation	true|false	false
require-from-keyword	true|false	false
strict	true|false	false
debug	true|false	false
validate-units	true|false	false

For more information on each of these options, see the CQL-to-ELM Overview.

NOTE:

• Previous versions of the CQL-to-ELM Translation Service defaulted annotations to true. To align better with the CQL-to-ELM console client, the translation service now defaults annotations to false.
• Previous versions of the CQL-to-ELM Translation Service allowed list-promotion to be disabled via an extra multipart form field named disablePromotion. This is no longer supported, as it was ambiguous and inconsistent with the CQL-to-ELM console clinet. The disable-list-promotion query parameter should be used instead.

Docker Deployment

You may deploy pre-built Docker images into your existing hosting environment with:

docker run -d -p 8080:8080 --restart unless-stopped cqframework/cql-translation-service:latest # or any official tag

And you're done. No environment variables or further configuration are needed. Jedis may use your existing Kubernetes, Open Shift etc installations as you see fit. :)

To build your own image:

docker build -t cqframework/cql-translation-service:latest . # but use your your own repo and tag strings!

License

Copyright 2016-2019 The MITRE Corporation

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.