The java.lang.module package specification defines the default set of root modules as “every module that is observable on the upgrade module path or among the system modules, and that exports at least one package without qualification.” There’s no need to use the term “observable” here, since any module in those two locations is, by definition, observable.

This should be changed to align with the wording in JEP 261: “every module on the upgrade module path or among the system modules that exports at least one package, without qualification.”

There is no substantive specification change here, so a CSR is not required.