Original text:
<del> (a) An adjective to describe a name server whose name is either </del>  subordinate to or (rarely) the same as the zone origin.  In- <del> bailiwick name servers require glue records in their parent zone </del>  (using the first of the definitions of "glue records" in the <del> definition above). (b) Data for which the server is either authoritative, or else authoritative for an ancestor of the owner name.  This sense of the term normally is used when discussing the relevancy of glue records in a response.  For example, the server for the parent zone "example.com" might reply with glue records for "ns.child.example.com".  Because the "child.example.com" zone is a descendant of the "example.com" zone, the glue records are in- bailiwick. The antonym of in-bailiwick. </del>  "All of the RRs attached to all of the nodes from the top node of the zone down to leaf nodes or nodes above cuts around the bottom

Reviewer comments:
Two definitions of In-bailiwick are unclear and seems the same. In-bailiwick name server names have two meanings. One is narrow and requires glue records. The other is wide and may have glue records. There are needs to distinguish two types of in-bailiwick name server names. Ondrej Sury used NS Types as in OARC 26. URL Peter Koch proposed "in domain", "sibing domain", and "unrelated". "unrelated" is out-of-bailiwick. URL I propose to add "in domain" and "sibling domain", update "in-bailiwick" and add a description for "out-of-bailiwick". If this proposal is reasonable, please improve the text and merge.
lgtm (apart from the typo)
I like the idea but still, this is sufficiently muddy area to warrant short example for each type. It will be great with examples and I will definitely support the new wording over the old one.

Revised text:
 <ins> An adjective to describe a name server whose name is either </ins> subordinate to or (rarely) the same as the zone origin.  In-  <ins> bailiwick name servers may have glue records in their parent zone </ins> (using the first of the definitions of "glue records" in the  <ins> definition above).  'In-bailiwick' names are divided into two type of name server names: 'in-domain' names and 'Sibling domain' names. An adjective to describe a name server whose name is either subordinate to or (rarely) the same as the ownwer name of the NS resource records.  In-domain name server name MUST have glue records or name resolution fails.  For example, a delegation for "child.example.com" may have "in-domain" name server name "ns.child.example.com". A name server's name that is either subordinate to or (rarely) the same as the zone origin and not subordinate to or the same as the owner name of the NS resource records.  Glue records for sibling domains are allowed, but not necessary.  For example, a delegation for "child.example.com" in "example.com" zone may have "Sibling" name server name "ns.another.example.com". The antonym of in-bailiwick.  An adjective to describe a name server whose name is not subordinate to or the same as the zone origin.  Glue records for out-of-bailiwick name servers are useless. </ins> "All of the RRs attached to all of the nodes from the top node of the zone down to leaf nodes or nodes above cuts around the bottom