UriSchemes/mid
"mid" is uriReg:schemeName of [ dc:description """message identifier"""; is uriReg:specifies of [ = <http://www.ics.uci.edu/pub/ietf/uri/rfc2111.txt>; dc:title """Content-ID and Message-ID Uniform Resource Locators"""; dc:creator [ dca:agentName "E. Levinson"], [dca:agentName "E. Levinson."]; inet:rfc "2111"; dc:date "1997-03"; ]; ] .
ProxyTopic; see IANA registry.----
See also other UriSchemes.
We're using NotationThree here, assuming TheUsualPrefixes.