These files are source assets, which is as close to source code as you can get with non-code stuff. For regular people who didn't drink the OSI koolaid, this is

These files are source assets, which is as close to source code as you can get with non-code stuff. For regular people who didn't drink the OSI koolaid, this is a perfectly valid and logical use of the term "open source". I don't know if that's the angle you're coming from, or if you just didn't know what usd was, but either way this is a good release.