Section 5 - Simple editorial comments

560-564: Avoid redefining URI and HREF. Define once and incorporate by reference at all other locations. Multiple discussions increase chance of incompatible interpretations. See "detailed comment on URI"

570-577. Consider making the use of lowerCamelCase normative.

591-593. Remover references to HTTP. URI works as well as HTTP URI and avoids creating confusion between normative statements here and those for other bindings.