C 2119.
    However, for readability,
    these words do not appear in all uppercase letters in this specification.

    </p>
   <p>All of the text of this specification is normative
    except sections explicitly marked as non-normative, examples, and notes. <a data-link-type="biblio" href="#biblio-rfc2119" title="Key words for use in RFCs to Indicate Requirement Levels">[RFC2119]</a>

    </p>
   <p>Examples in this specification are introduced with the words “for example”
    or are set apart from th