PAX PDL - a non-procedural packet description language

Document Type Expired Internet-Draft (individual)
Authors Misha Nossik  , Michael Richardson  , Feliks Welfeld 
Last updated 1998-10-19
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes PAX Pattern Description Language (PDL). PAX is a special purpose language for definitions of filters (recognizers) for sequential inputs. The language is suitable for describing pattern matching criteria in policy-based networking devices such as QoS routers and switches, packet filters, RMON probes, traffic shapers, etc. It pro- vides consistent means of programming policy-based networking devices based on different hardware and software platforms. Programs written in PAX can be built incrementally, where elementary patterns can be used as building blocks for more complex ones. The language encourages modular and object-oriented design.


Misha Nossik (
Michael Richardson (
Feliks Welfeld (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)