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AMF (AML Modeling Framework) is an open-source library capable of parsing and validating AML metadata documents.
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AgustinBettati Merge pull request #444 from aml-org/APIMF-1421-duplicated-parameters
APIMF-1421 - Sibling parameters must be unique by name and binding.
Latest commit 45061d0 Mar 18, 2019
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amf-client APIMF-1421 - adjusted reports in tests. Mar 18, 2019
amf-core APIMF-1421 - naming refactoring and simplifying code. Mar 18, 2019
amf-tools/jvm/src/test/resources Move dialect exported logic to client module. Remove amf-tools module Feb 22, 2019
documentation basic use cases doc Jun 28, 2018
project Added LiteralUri Mar 15, 2019
.gitignore Add amf-client npm link folders to gitignore Mar 12, 2019
build.sbt Move dialect exported logic to client module. Remove amf-tools module Feb 22, 2019 Make install executable. Oct 16, 2018 Build js script now checkouts package.json version. Jul 3, 2018

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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 1.0 RAML, 0.8 RAML, 2.0 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 2.0" -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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