http://www.rfc-editor.org/rfc/rfc2569.txt
RFC 2569: Mapping between LPD and IPP Protocols, R. Herriot, T. Hastings, N. Jacobs, J. Martin1999-04-01T23:00:00-00:00This document is one of a set of documents, which together describe all aspects of a new Internet Printing Protocol (IPP). One of the purposes of this document is to compare the functionality of the two protocols. Another purpose is to facilitate implementation of gateways between LPD and IPP. This memo defines an Experimental Protocol for the Internet community.