Libre resources

A libre resource is a (typically digital) resource (such as text, software, source code, an image, sound, multimedia, etc. or combinations of these) represented on a device or medium in a free/open file format, which is accessible and modifiable with free software, and released under a license which grants users the freedom to access, read, listen to, watch, or otherwise experience the resource; to learn with, copy, perform, adapt and use it for any purpose; and to contribute and share enhancements or derived works. Libre resources are free of technologies which restrict one from exercising these freedoms.