:linkattrs:
http://discuss.asciidoctor.org/[*mailing list*, role="green"]
>>>
Document
  { docMeta =
      Meta
        { docTitle = []
        , docTitleAttributes = Nothing
        , docAuthors = []
        , docRevision = Nothing
        , docAttributes =
            fromList [ ( "linkattrs" , "" ) , ( "sectids" , "" ) ]
        }
  , docBlocks =
      [ Block
          mempty
          Nothing
          (Paragraph
             [ Inline
                 Attr
                 ( [] , fromList [ ( "role" , "green" ) ] )
                 (Link
                    URLLink
                    (Target "http://discuss.asciidoctor.org/")
                    [ Inline mempty (Bold [ Inline mempty (Str "mailing list") ]) ])
             ])
      ]
  }