Should Solid specify a syntax for Realm?

[bblfish]

I am trying to work out what the meaning of Realm could be in HttpSig. Do we use it consistently elsewhere?

An obvious way to use it would be to have it related to Containers and subcontainers.
Perhaps the following would say that any authentication is ok for any sub resource in "/comments/"?

HTTP/1.1 401 Unauthorized
WWW-Authenticate: HttpSig realm="/comments/"
Date: Thu, 01 Apr 2021 00:01:03 GMT
Link: <http://www.w3.org/ns/ldp#BasicContainer>; rel=type
Link: <http://www.w3.org/ns/ldp#Resource>; rel=type
Link: </comments/.acl>; rel=acl

or should it be something with some form of regex as in

HTTP/1.1 401 Unauthorized
WWW-Authenticate: HttpSig realm="/comments/**"
Date: Thu, 01 Apr 2021 00:01:03 GMT
Link: <http://www.w3.org/ns/ldp#BasicContainer>; rel=type
Link: <http://www.w3.org/ns/ldp#Resource>; rel=type
Link: </comments/.acl>; rel=acl

[elf-pavlik]

#9 includes some thoughts on realm