CONTENTS

 1     Scope
 2     Normative references
        2.1     Identical Recommendations | International Standards
        2.2     Additional references
 3     Abbreviations
 4     Definitions and concepts
        4.1     Basic Reference Model concepts
        4.2     Additional definitions and concepts
 5     Overview
        5.1     General
        5.2     Interworking and encapsulation
 6     Principles of protocol identification
        6.1     Need for protocol identification
        6.2     Protocol identifier registries and values
        6.3     Protocol identification methods
        6.4     Protocol identifiers
 7     Principles of protocol encapsulation
        7.1     Encapsulation function
        7.2     Protocol encapsulation methods
        7.3     Relationships among EFs, EdPs, and EgPs
Annex A – Current Recommendations | International Standards supporting PIE principles
Annex B – Examples of protocol identification and encapsulation methods