Hi! i am working on the Horizon 'side' of https://bugs.launchpad.net/nova/+bug/1256119 , where basically if you create a ExtraSpec key containing '/', then it cannot be deleted anymore. Is there any restriction about this? Shall the format of the keys be limited to some specific format or any combination should be valid? For instance, heat use this pattern for stack names: [a-zA-Z][a-zA-Z0-9_.-]* . Regards Leandro