tmip isa restful-protocol
! TMIP
! TM Interaction Protocol
specification: http://kill.devc.at/system/files/tmip-specification-0.3.html

tmrap isa restful-protocol
! TMRAP
specification: http://www.garshol.priv.no/download/text/tmrap.pdf

topincs-rest isa restful-protocol
! Topincs REST
paper: http://www.cerny-online.com/documents/Topincs%20-%20A%20RESTful%20Web%20Service%20Interface%20for%20Topic%20Maps%20%28Paper%29.pdf
slides: http://www.cerny-online.com/documents/Topincs - A RESTful Web Service Interface for Topic Maps (Slides).pdf

shelter-rest isa restful-protocol
! Shelter REST Framework
announcement: http://shelter.nu/blog/2008/05/restful-topicmaps-framework-restmap.html

restful-protocol subclasses protocol .