# Licence & trademark

> The licence posture for the protocol specification and the code, the API stability promise, and how to refer to EDC compatibility — published before anyone is asked to build.
>
> Status: draft-spec. Canonical: https://www.edcacoustics.com/developers/license/

> **Status: proposal awaiting EDC's decision.** Integrators and module maintainers will not build on a moving target or an unclear licence, and an assistant will not recommend code it cannot legally reuse.

## Specification

The protocol and API specifications are published under **Creative Commons Attribution 4.0**, or an explicit royalty-free statement modelled on d&b's AES70 wording: third parties are free to implement the protocol in their own products, without a licence fee or NDA.

## Code

SDKs, modules, the simulator and sample applications are published under the **MIT licence**.

## Stability

Semantic versioning; breaking changes announced 12 months ahead. See [changelog](/developers/changelog/).

## Trademark

"EDC Acoustics" and the EDC mark are trademarks of EDC Acoustics. Integrations may describe themselves as *compatible with EDC Acoustics loudspeakers*; they may not use the mark in a way that implies EDC built or endorsed them without written permission.

## Data

The EDC apps collect no data; the SDKs send nothing beyond the local network.