RFC 7991, "The "xml2rfc" Version 3 Vocabulary", December 2016Source of RFC: IAB
Errata ID: 5052
Reported By: Henrik Levkowetz
Date Reported: 2017-06-25
Section B.1 says:
It should say:
Section B.1. talks about using XInclude for inclusion of external materials, instead of using entity references or processing instructions to include materials. It shows an example namespace declaration:
and then continues with various examples using <xi:include/>, except that in one case, an 'i" has been dropped from the "xi:", giving <x:include...>.