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    AML Modeling Framework

    This project aims to provide a common programming interface that lets developers interact with any API specification, whether it is written in OpenAPI Specification (OAS) or RAML, similar to the way the HTML DOM allows programmatic interaction with an HTML document.


    The API Modeling Framework (AMF) allows users to formally describe different kinds of APIs, parse and generate instances of those APIS as sets of modular documents and store those connected descriptions into a single unified data graph.


    • Support for multiple languages with a unified output API/model for clients
    • Support for both, document (RAML modularity) and domain (service clients), layers
    • Bi-directional transformation
    • Support for validation at document and service layers
    • Produce a formal specification for the language
    • Extensible, single document model for multiple domain vocabularies
    • Consistent parsing behavior

    General scope

    The library supports many of the required uses cases:

    • Parse a 0.8 / 1.0 RAML, 2.0 / 3.0 OAS and JSON-LD AMF model.
    • AMF API design model creation.
    • Model edition.
    • Export to any of the mentioned standards.


    To use AMF you should first generate or get the right distribution for your project and import them as dependencies.



    • Scala 2.12.2
    • sbt 0.13.15
    • Node

    Useful sbt commands


    • Tests on jvm and js
    sbt test

    Coverage reports

    sbt coverage test coverageReport

    Generate artifacts directly from cloned repository

    sbt package

    This will generate jvm JARs in each of the module's targets.

    sbt buildJS

    This will generate a js artifact in ./file://amf-client/js/amf.js

    JVM artifacts

    To use, specify dependency.

    Gradle example:

    dependencies {
        compile 'com.github.amlorg:amf-client_2.12:x.y.z'
    repositories {
        maven {
                url ''

    Maven example:


    NOTE: you may use the -SNAPSHOT versions of the JVM artifacts at your own risk since those snapshot versions may contain breaking changes.

    JS artifacts

    Execute the command

    npm install --save amf-client-js

    Using Node.js just import it using:

    import amf from 'amf-client-js'

    The amf package will contain all exported classes:

    amf.Core.init().then(function () {
      // AMF code here

    Command line usage

    You can build a standalone Java executable (JAR) running the following SBT target:

    sbt buildCommandLine

    This will generate an executable JAR at the top level directory that can be used to execute AMF from the command line.

    Using this JAR, you can run tasks from command line, for instance:

    java -jar amf-x.y.z.jar parse -in "RAML 1.0" -mime-in "application/yaml" yourAPIfile


    java -jar amf-x.y.z.jar validate -in "RAML 1.0" -mime-in "application/yaml" -p "RAML" yourAPIfile


    java -jar amf-x.y.z.jar translate  yourAPIOASfile --format-in "OAS 3.0" -mime-in "application/json" --format-out "RAML 1.0" -mime-out "application/raml+yaml"

    To get all available options:

    java -jar amf-x.y.z.jar

    Using this JAR you can execute AMF by passing one of the following commands:

    • parse <input_file> -in FORMAT
    • translate <input_file> <output_file> -in FORMAT_IN -out FORMAT_OUT
    • validate <input_file> -in FORMAT_IN -p VALIDATION_PROFILE

    An interactive section can be started using the repl command.

    If you want to parse any RAML dialect other than RAML 1.0, you can pass a list of dialects to be loaded in the parser through the dialects option.

    Refer to the usage of the application for additional commands and explanations.


    Go to amf examples repository There are examples for each one of the three usages and a converter project that add some UI on top of the library.


    Validation is one of the key features of AMF. Please check the following link to get more information:

    Validation insights

    Want to learn more?

    Click here for more documentation and playground

    Want to contribute?

    If you are interested in contributing code to this project, thanks! Please read and accept the Contributors Agreement. This should automatically create a Github issue with the record of your signature here. If for any reason, you do not see your signature there, please contact us.




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