Ensure validation of directive arguments

At a glance

• Identifier: #463
• Stage: RFC3: Accepted
• Champion: @leebyron
• PR: Ensure validation of directive arguments

Timeline

• Spec PR created on 2018-06-11 by leebyron
• Commit pushed: Ensure validation of directive arguments on 2018-06-11 by Travis CI

---

naming requirements and input type