We should assign a category to a license-expression to clarify `license WITH exception` cases

[pombredanne]

For instance GPL-2.0 WITH Classpath-exception 2.0 should be treated as Copyleft-limited and not as Copyleft

This was reported by @DennisClark and it could be that all exceptions to a Copyleft license turn a license expression in a Copyleft-limited

[DennisClark]

this needs more detail to explain the issue and what ought to be done about it.

[DennisClark]

basically we are talking about applying a category to a license_expression, so that the category of the Exception influences the category of the expression, thus simplifying and improving the review process.

[DennisClark]

consider as a general principle that the category of the exception overrides the category of the license to which it is applied

[DennisClark]

however, that assumes that the categories of the exceptions are correct -- should be reviewed.
and
we need to consider that a License Expression has its own Category; in other words, what is the prevailing category for an expression
for example mit or gpl is permissive

let's call it expression-category
The license category that is actually effective when a software object has a complex license expression.

[DennisClark]

perhaps this new field belongs on the package model

[DennisClark]

better yet, let's call it license-expression-category