The SPDX standard helps facilitate compliance with free and open source software licenses by standardizing the way license information is shared. SPDX reduces redundant work by providing a common format for companies and communities to share important data about software licenses and copyrights, thereby streamlining and improving compliance.
The SPDX specification is developed by the SPDX workgroup, which is hosted by the Linux Foundation. The grass-roots effort includes representatives from more than 20 organizations—software, systems and tool vendors, foundations and systems integrators—all committed to creating a standard for software package data exchange formats.
That two paragraphs are merely blatantly copied from the homepage. Heard about the project last weekend and like the idea. Can make it easier to document your work and share that. The license list (more files) looks like a practical resource to me in related contexts as well, I like the idea of having identifiers.