<div dir="ltr"><div>Dear colleagues,</div><div><br></div><div>I am reviewing normative references of the OPC revision draft.</div><div><br></div><div>1) XML 3th edition</div><div><br></div><div>We should drop XML 3th edition since we already have the 4th edition</div><div>as a normative reference.</div><div><br></div><div>2) Reference to RFC 4234 (ABNF)</div><div><br></div><div>We have two problems. First, this RFC is obsoleted by RFC 5234.</div><div>Second, we borrow path segments defined RFC 3986 and 3987, but they</div><div>use RFC 2234, which is obsoleted by RFC 4234.</div><div><br></div><div>I think that we should use the latest version, RFC 5234. RFC 7231</div><div>does the same thing even though it references the non-terminal defined</div><div>RFC 3987. To mimic RFC 7231, we should also introduce a production</div><div>rule:</div><div><br></div><div> isegment-nz = <isegment-nz, see [RFC3987], Section 2.2></div><div><br></div><div>3) W3C DTF</div><div><br></div><div>W3C DTF is a W3C Note rather than a recommendation. We are not</div><div>allowed to reference a W3C Note, unless we create a reference</div><div>explanatory report.</div><div><br></div><div>I am wondering if we can migrate to gYear, gYearMonth, date, and</div><div>datetime of W3C XML Schema Part 2.</div><div><br></div><div>Regards,</div><div>Makoto</div>
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