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201 changes: 201 additions & 0 deletions LICENSE
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Apache License
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8 changes: 4 additions & 4 deletions OVERVIEW.md
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CQL Execution Framework Reference Implementation
================================================

The reference implementation for executing CQL is currently under development. The reference implementation is intended to be used in CQF pilots and eventually integrated into production eCQM tools such as Bonnie and Cypress.
The reference implementation for executing CQL is currently under development. The reference implementation is intended to be used in CQF pilots and integrated into production eCQM tools such as Bonnie and Cypress.

The CQL execution framework is licensed under the open source [Apache Version 2.0](../../../LICENSE) license, and available as part of the [clinical_quality_language](https://github.com/cqframework/clinical_quality_language) project on GitHub.
The CQL execution framework is licensed under the open source [Apache Version 2.0](../../../LICENSE) license.

Technologies
------------
Expand All @@ -19,7 +19,7 @@ Approach

### JSON ELM

Despite its name, the CQL execution framework does not execute CQL directly. Instead, it executes a JSON representation of the ELM. The [cql-to-elm](../../java/cql-to-elm) project is a reference implementation for translating CQL to ELM in XML or JSON.
Despite its name, the CQL execution framework does not execute CQL directly. Instead, it executes a JSON representation of the ELM. The [cql-to-elm](https://github.com/cqframework/clinical_quality_language/tree/master/Src/java/cql-to-elm) project is a reference implementation for translating CQL to ELM in XML or JSON.

Consider the following CQL:

Expand Down Expand Up @@ -124,4 +124,4 @@ Besides the `exec(patient_source)` method, the Executor class contains a couple
Current Status
--------------

The CQL execution framework is still evolving and is not yet complete. The patient API, code service API, and format of results are likely to change quite a bit as implementation matures. In addition, there are still CQL/ELM operators not yet implemented in the execution framework.
The CQL execution framework is still evolving and is not yet complete. The patient API, code service API, and format of results may change as implementation matures. In addition, there may be CQL/ELM operators not yet implemented in the execution framework.
27 changes: 14 additions & 13 deletions README.md
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# CQL Execution Framework

The CQL Execution Framework is a set of [CoffeeScript](http://coffeescript.org/) libraries that
can execute CQL artifacts expressed as JSON ELM. At this point, only a small subset of
functionality has been implemented (and a very simple JSON-based patient format is used).
can execute CQL artifacts expressed as JSON ELM.

For more information, see the [CQL Execution Framework Overview](OVERVIEW.md).

Expand All @@ -11,8 +10,9 @@ For more information, see the [CQL Execution Framework Overview](OVERVIEW.md).
To use this project, you should perform the following steps:

1. Install [Node.js](http://nodejs.org/)
2. Install [CoffeeScript](http://coffeescript.org/)
3. Execute the following from the _cql-execution_ directory: `npm install`
2. Install [Yarn](https://yarnpkg.com)
3. Install [CoffeeScript](http://coffeescript.org/)
4. Execute the following from the root directory: `yarn install`

# To Execute Your CQL

Expand All @@ -24,11 +24,12 @@ There are several steps involved to execture CQL. First, you must create a JSON
For easiest integration, we will generate a coffee file using cql-to-elm:

1. Install the [Java 8 SDK](http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html)
2. `cd ${branch}/Src/java` (replacing `${branch}` with the path to your git branch)
2. Clone the [clinical_quality_language](https://github.com/cqframework/clinical_quality_language) repository to a location of your choice
2. `cd ${path_to_clinical_quality_language}/Src/java` (replacing `${path_to_clinical_quality_language}` with the path to the local clone)
3. `./gradlew :cql-to-elm:installDist`
4. `./cql-to-elm/build/install/cql-to-elm/bin/cql-to-elm --format=COFFEE --input ${path_to_cql} --output ${branch}/Src/coffeescript/cql-execution/src/`
4. `./cql-to-elm/build/install/cql-to-elm/bin/cql-to-elm --format=COFFEE --input ${path_to_cql} --output ${path_to_cql-execution}/src/`

The above example put the example CQL into the coffeescript src directory to make things easy, but it
The above example puts the example CQL into the src directory to make things easy, but it
doesn't _have_ to go there. If you put it elsewhere, you'll need to compile it to javascript and
modify the examples below with the new path (where applicable).

Expand All @@ -51,7 +52,7 @@ define InDemographic:
Next, create a coffeescript file to execute the measure. This file will need to contain (or
`require`) JSON patient representations for testing as well. Since our example CQL uses the QUICK
data model, each patient is represented using a FHIR bundle. For ease of use, let's put the file
in the `coffeescript/cql-execution/src` directory:
in the `src` directory:

```coffee
cql = require './cql'
Expand Down Expand Up @@ -109,22 +110,22 @@ In the above file, we've assumed the JSON ELM coffeescript file for the measure
also assumed a couple of very simple patients. Let's call the file we just created
`age-exec.coffee`.

Now we must compile it to javascript in the `${branch}/Src/coffeescript/cql-execution/lib`
directory. There is a simple Cakefile build script for this (cake is installed with coffeescript):
Now we must compile it to javascript in the `lib` directory. There is a simple Cakefile
build script for this (cake is installed with coffeescript):

1. `cd ${build}/Src/coffeescript/cql-execution`
1. `cd ${path_to_cql-execution}`
2. `cake build`

Now we can execute the measure using Node.js:

1. `cd ${build}/Src/coffeescript/cql-execution/lib`
1. `cd ${path_to_cql-execution}/lib`
2. `node age-exec`

If all is well, it should print the result object to standard out.

# To Run the CQL Execution Unit Tests

Execute `npm test` or `cake test`.
Execute `yarn test` or `cake test`.

# To Develop Tests

Expand Down

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