A Role name is a name by which a role can be referred to, and which identifies that role in contexts in which it is used. Accordingly, using it without properly referencing the context may cause misunderstandings, as role names refer to different roles in different contexts.
A role name is also used to refer to an (arbitrary) entity that performs the role that the role name actually refers to. For example if 'issuer' is a role-name for entities. For example, the role name 'Agent' is used to generically refer to an (arbitrary) actor that is executing some action on behalf of a party.