François Patte, 19.6.2019 10:22 +0200:
What is BLS? google gives me:
Adding "Linux" or "Fedora" to your search would have resulted in more
relevant results.
To answer your question: it's short for "BootLoaderSpec"
for example:
https://www.freedesktop.org/wiki/Specifications/BootLoaderSpec/
https://fedoraproject.org/wiki/Changes/BootLoaderSpecByDefault
--
Regards
mks