Concerto is a lightweight 100% JavaScript schema language and runtime. It works in both a Node.js process and in your browser. The browserified version of Concerto is ±280KB. We are working on making it even smaller.

This is why you should care: https://www.accordproject.org/news/strongly-typed-data-for-javascript-and-beyond/

Things you can do using Concerto:

• Define an object-oriented model using a domain-specific language that is much easier to read and write than JSON/XML Schema, XMI or equivalents. The metamodel gives you "just enough" expressivity to capture real-world business models, while remaining easy to map to most runtime environments.
• Optionally edit your models using a powerful VS Code add-on with syntax highlighting and validation
• Create runtime instances of your model
• Serialize your instances to JSON
• Deserialize (and optionally validate) instances from JSON
• Instances are JS objects so they are easy to pass around your application
• Introspect the model using a powerful set of APIs
• Convert the model to other formats: JSON Schema, XML Schema, Java, Go, Typescript, Loopback, PlantUML using concerto-tools.
• Import models from URLs
• Publish your reusable models to any website, including the Accord Project Open Source model repository, hosted at: https://models.accordproject.org

Top level repository (concerto), with sub packages. Each sub-package is published as an independent npm module using lerna:

• concerto-cli : command-line interface for Concerto
• concerto-core : core library for model management/parsing/validation/serialization
• concerto-tools : model converters and tools for Concerto model files

To install the command-line interface:

npm install -g @accordproject/concerto-cli

Accord Project is an open source, non-profit, initiative working to transform contract management and contract automation by digitizing contracts. Accord Project operates under the umbrella of the Linux Foundation. The technical charter for the Accord Project can be found here.

• Accord Project
• Accord Project News
• Accord Project Blog
• Accord Project Slack
• Accord Project Technical Documentation
• Accord Project GitHub

• Getting Started with Accord Project
• Concepts and High-level Architecture
• How to use the Cicero Templating System
• How to Author Accord Project Templates
• Ergo Language Guide

Projects	Package name	Version	Description
Cicero	cicero-core		Templates Core
	cicero-cli		Cicero CLI
	cicero-engine		Node.js VM based implementation of Accord Protcol Template Specification execution
	cicero-server		Wraps the Cicero Engine and exposes it as a RESTful service
	cicero-test		Testing support for Cicero based on cucumber
	cicero-tools		Cicero Tools
	generator-cicero-template		Code generator for a Cicero Template
Concerto	concerto-core		Core Implementation for the Concerto Modeling Language
	concerto-tools		Tools for the Concerto Modeling Language
	concerto-cli		command-line interface for Concerto
Ergo	ergo-cli		Ergo CLI
	ergo-compiler		Ergo compiler
	ergo-test		Ergo test
	ergo-engine		Ergo engine
Markdown	markdown-common		A framework for transforming markdown
	markdown-slate		Transform markdown to/from CommonMark DOM
	markdown-cli		CLI for markdown transformations.
	markdown-cicero		Markdown extensions for contracts, clauses, variables etc.
	markdown-html		Transform CiceroDOM to HTML

Projects	Package name	Version	Description
Markdown Editor	markdown-editor		WYSIWYG rich text web editor for markdown based on Slate.js
Cicero UI	cicero-ui		React UI components for Cicero
Concerto UI	concerto-ui		Dynamic web forms generated from Concerto models

The Accord Project technology is being developed as open source. All the software packages are being actively maintained on GitHub and we encourage organizations and individuals to contribute requirements, documentation, issues, new templates, and code.

Find out what’s coming on our blog.

Join the Accord Project Technology Working Group Slack channel to get involved!

For code contributions, read our CONTRIBUTING guide and information for DEVELOPERS.

Accord Project source code files are made available under the Apache License, Version 2.0. Accord Project documentation files are made available under the Creative Commons Attribution 4.0 International License (CC-BY-4.0).

Copyright 2018-2019 Clause, Inc. All trademarks are the property of their respective owners. See LF Projects Trademark Policy.