Indeed, the text only speaks of a "common charger" without specifying further, so I'm somewhat surprised you make the claim the directive speaks only about one sub-part of the charger.
To me things appear thus: the EP passed a directive that states mobile radio equipment should have a "common charger", sensibly letting manufacturers decide how to solve the interoperability problem. Apple then argued "well, it's not explicit that you should be able use the 'common charger' without an adapter" and continued making phones that can't be charged by equipment made by others.
This join resolution isn't super clear about it, but does indicate that: "common charger" really ought to mean you can use the same charger for all similar devices.
To me things appear thus: the EP passed a directive that states mobile radio equipment should have a "common charger", sensibly letting manufacturers decide how to solve the interoperability problem. Apple then argued "well, it's not explicit that you should be able use the 'common charger' without an adapter" and continued making phones that can't be charged by equipment made by others.
This join resolution isn't super clear about it, but does indicate that: "common charger" really ought to mean you can use the same charger for all similar devices.