Inconsistent wording between Annotations, Property Keys, and Node Names

[Lucretiel]

Node names and Property keys are described as:

...a legal Identifier, or a quoted String.

Whereas annotations are described as:

with a single Identifier in it.

Generally throughout the spec, Identifiers, Strings, and Raw strings are distinguished, and union cases simply name all the possible types. As a generalization of this specific issue, I'd like to propose the following hierarchy (used by kaydle's parser) to simplify the naming of strings throughout the spec:

• Identifiers may be:
  • Bare Identifiers, or
  • Strings, which may be:
    • Quoted Strings, or
    • Raw Strings.