There’s a new (April 2015) Volume Licensing Brief to give assistance in determining baseline licences in the Server and Cloud Enrolment.

The main part of the brief gives a recap of the rules but it’s the FAQ section that’s probably most interesting where it covers SQL Embedded, licences for old development tools with or without MSDN, and OEM and ISV licences.

If the SCE is your thing then this brief is worth a read and you can find it here: http://bit.ly/1yPCEl2.