A news from the Linux Foundation : the Software Package Data Exchange.
This " is a standard format for communicating the components, licenses and copyrights associated with a software package ".
Another project, since few months, Open Source Cartouche. I think it easier than SPDX :
" The Open Source Cartouche is a method which aim to help developers, projects managers and legal advisor to choose and track the multiple Open Source Components that could be included in project’s source code. "
By example Scol and LPGL licences .. ;-)
SPDX : http://www.spdx.org/
Open Source Cartouche : http://www.opensourcecartouche.org/