CONTENTS

 1     Scope
 2     Normative references
        2.1     ITU-T Recommendations
        2.2     ISO/IEC Standards
        2.3     Other references
 3     Definitions
 4     Abbreviations
 5     Conventions
 6     Basic concepts and models
        6.1     Functional model
        6.2     Service models
 7     Principles for the organization of an interconnected computerized international information service
 8     Service specification
        8.1     Inquiry information
        8.2     Reply information
        8.3     Conversion
        8.4     Version 2 extensibility
        8.5     Functionality
 9     Common protocol specification elements
        9.1     Character sets, encoding and repertoire
        9.2     Filter concept
        9.3     Matching and matching rules
        9.4     Paging
        9.5     Hierarchical groups
        9.6     The keyword concept of version 1 (2005)
10     Version 1 (2005) of the Directory Assistance protocol specification
       10.1     Overview
       10.2     Inquiry format
       10.3     Reply format
11     Version 2 of the Directory Assistance protocol specification
       11.1     Overview
       11.2     Inquiry format
       11.3     Reply format
12     TCP adaptation protocol
       12.1     Introduction
       12.2     Security
       12.3     Application connection establishment
       12.4     Application data transfer
       12.5     Application connection release
13     Use of the service provided by TCP
       13.1     TCP connection establishment (socket connection)
       13.2     Data transfer
       13.3     TCP connection release
14     Operator's manual
Annex A – Directory Assistance keywords of Directory Assistance protocol version 1 (2005)
        A.1     Functional keywords table
        A.2     Descriptive keywords table
Annex B – Directory Assistance protocol version 1 (2005) in ASN.1
Annex C – Directory Assistance protocol version 2 in ASN.1
Annex D – Directory Assistance protocol version 2 in XSD
Annex E – Message codes for Recommendation E.115
Appendix I – NACE nomenclature
        I.1        About NACE
        I.2        NACE structure
        I.3        NACE at work
        I.4        Extract from NACE
Appendix II – Examples of BER encodings
       II.1     Introduction
       II.2     Example of ASN.1 BER encoding of the DA protocol version 1 (2005)
       II.3     Example of ASN.1 BER encoding of the DA protocol version 2