1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS PICS PROFORMAS OPEN SYSTEMS INTERCONNECTION - X.256 (04/95) INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - CONNECTIONLESS PRESENTATION PROTOCOL: PROTOCOL
2、IMPLEMENTATION CONFORMANCE STATEMENT (PICS) PROFORMA ITU-T Recommendation X.256 (Previously “CCIlT Recommendation”) ITU-T RECMN*X.256 95 4862593 0603356 T43 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The IT Teleco
3、mmunication Standardization Sector (ITU-T) is a permanent organ of the ITU. Some 179 member countries, 84 telecom operating entities, 145 scientific and industrial organizations and 38 international organizations participate in IT-T which is the body which sets world telecommunications standards (Re
4、commendations). The approval of Recommendations by the Members of ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, 1993). In addition, the World Telecommunication Standardization Conference (WTSC), which meets every four years, approves Recommendations submitted to it
5、and establishes the study programme for the following period. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. The text of IT-T Recommendation X.256 was approved on 10th of April 1995. The identi
6、cal text is also published as ISO/IEC International Standard 9576-2. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1995 All rights reserved. No part of this publication
7、 may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. ITU-T RECMN*X-256 75 YBb259L Ob03357 78T PUBLIC DATA NETWORKS Services and Facilities ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS A
8、ND OPEN SYSTEM COMMUNICATIONS (February 1994) ORGANIZATION OF X-SERIES RECOMMENDATIONS X.l-X.19 I Subject area 1 Recommendation Series I Transmission, Signalling and Switching Network Aspects X.50-X.89 X.90-X. 149 I Interfaces I X.20-X.49 I Maintenance Administrative Arrangements X.150-X. 179 X.180-
9、X.199 Model and Notation Service Definitions I OPEN SYSTEMS INTERCONNECTION I I X.200-X.209 X.2 1 O-X.219 Connectioniess-mode Protocol Specifications PICS Proformas I Connection-mode Protocol Specifications I X.220-X.229 I X.230-X.239 X.240-X.259 Protocol Identification Security Protocols X.260-X.26
10、9 X.270-X.279 I Layer Managed Objects I X.280-X.289 I Conformance Testing INTERWORKING BETWEEN NETWORKS X.290-X.299 I General I X.300-X.349 I Management MESSAGE HANDLING SYSTEMS I Mobile Data Transmission Systems I X.350-X.369 I X.370-X.399 x.400-x.499 DIRECTORY x.500-x.599 OS1 NETWORKING AND SYSTEM
11、 ASPECTS Networking I Naming, Addressing and Registration I X.650-X.679 I X.600-X. 649 Abstract Syntax Notation One (ASN.1) OS1 MANAGEMENT I SECURITY I X.800-X.849 I X.680-X.699 X.700-X.799 OS1 APPLICATIONS Commitment, Concurrency and Recovery I Transaction Processing I X.860-X. 879 I X.850-X.859 Re
12、mote Operations OPEN DISTRIBUTED PROCESSING X.880-X.899 X.900-X.999 ITU-T RECMN*X-25b 95 486259% Ob03358 83b CONTENTS Summary . Introduction . 1 Scope 2 Normative references . 2.1 Identical Recommendations I International Standards 2.2 Paired Recommendations I International Standards equivalent in t
13、echnical contents . 3 Definitions 3.3 Additional terms 4 Abbreviations . 5 Conformance Annex A - Protocol Implementation Conformance Statement (PICS) proforma for the connectionless presentation protocol A . 1 A.2 A.3 A.4 A.5 A.6 A.7 A.8 Identification of PICS proforma corrigenda . Instructions A.2.
14、1 Purpose and structure of the proforma A.2.2 Symbols, terms and abbreviations A.2.2.1 Introduction . A.2.2.2 Prerequisite notation . A.2.2.3 Item numbering . A.2.2.4 Status column Definitions applying to the table in A.6 Definitions applying to the tables in A.7 A.2.2.5 Support column . A.2.3 Instr
15、uctions for completion . Identification of the implementation . A.3.1 Date of statement A.3.2 Implementation details Protocol identification . A.4.1 ITU-T Rec . X.236 1 ISOhEC 9576-1 protocol details A.4.2 ITU-T Rec . X.236 I ISOhEC 9576-1 technical corrigenda implemented . Global statement of confo
16、rmance . A.2.2.4.1 A.2.2.4.2 Support for UD PPDU Supported parameters A.7.1 UD PPDU sender A.7.2 UD PPDU receiver Support of syntaxes . A.8.1 Transfer syntaxes supported . A.8.2 Abstract syntaxes supported . A.8.3 Use of ASN.l basic encoding . A.8.4 PDV structure of User Data parameters ITU-T Rec .
17、X.256 (1995 E) Page ii . 111 1 1 1 1 2 2 2 2 3 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 6 6 6 6 6 7 7 7 7 7 8 8 8 i ITU-T RECMN*X.256 95 W 4862593 Ob03159 752 = Summary This Recommendation I International Standard provides the Protocol Implementation Conformance Statement (PICS) proforma for the OS1 connection
18、less Presentation protocol which is specified in Recommendation X.236. The PICS proforma represents, in tabular form, the mandatory and optional elements of the connectionless Presentation protocol. The PICS proforma is used to indicate the features and choices of a particular implementation of the
19、connectionless Presentation protocol. Il ITU-T Rec. X.256 (1995 E) ITU-T RECNN*X*25b 95 H 48b2.591 Ob03360 474 Introduction This Recommendation I International Standard is one of a set of Recommendations I International Standards produced to facilitate the interconnection of information processing s
20、ystems. It is related to other Recommendations and International Standards in the set as defined by the Reference Model for Open Systems Interconnection (see ITU-T Rec. X.200 I IS0 7498-1). The Reference Model subdivides the area of standardisation for interconnection into a series of layers of spec
21、ification, each of manageable size. The goal of Open Systems Interconnection is to allow, with a minimum of technical agreement outside the interconnection Recommendations and International Standards, the interconnection of information processing systems: - from different manufacturers; - under diff
22、erent managements; - - of different technologies. of different levels of complexity; and IT-T Rec. X.236 I ISO/IEC 9576-1 specifies the connectionless presentation protocol. It specifies the presentation protocol encoding and procedures to be used to meet the needs of presentation-service-users. To
23、evaluate the conformance of a particular implementation, it is necessary to have a description of the capabilities and options which have been implemented. Such a description is called a Protocol Implementation Conformance Statement (PICS). This Recommendation I International Standard includes the P
24、ICS proforma or the connectionless presentation protocol as defined in ITU-T Rec. X.236 I ISO/IEC 9576- 1. ITU-T Rec. X.256 (1995 E) iii ITU-T RECMNoX.25b 95 = 4b259L 06033b3 300 = ISO/IEC 9576-2 : 1995 (E) INTERNATIONAL STANDARD ITU-T RECOMMENDATION INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNEC
25、TION - CONNECTIONLESS PRESENTATION PROTOCOL: PROTOCOL IMPLEMENTATION CONFORMANCE STATEMENT (PICS) PROFORMA 1 Scope This Recommendation I International Standard provides the Protocol Implementation Conformance Statement (PICS) proforma for IT-T Rec. X.236 I ISOiEC 9576-1 in compliance with the releva
26、nt requirements, and in accordance with the relevant guidance given in ITU-T Rec. X.296 I ISOAEC 9646-7. Detail of the use of this proforma is provided in this Recommendation I International Standard. The supplier of an implementation which is claimed to conform to IT-T Rec. X.236 I ISO/IEC 9576-1 i
27、s required to complete a copy of the PICS proforma provided in Annex A, and is required to provide the information necessary to identify both the supplier and the implementation. 2 Normative references The following Recommendations and International Standards contain provisions which, through refere
28、nce in this text, constitute provisions of this Recommendation I International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and the parties to agreements based on this Recommendation I International Standard are e
29、ncouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITLJ maintains a list of curren
30、tly valid ITU-T Recommendations. 2.1 Identical Recommendations I International Standards - ITU-T Recommendation X.200 (1994) I ISO/IEC 7498-1: 1994, Information technology - Open Systems Interconnection - Basic Reference Model: The Basic Model. ITLJ-T Recommendation X.216 (1994) I ISODEC 8822: 1994,
31、 Information technology - Open Systems Interconnection - Presentation service definition. ITU-T Recommendation X.236 (1995) I ISOAEC 9576-1: 1995, Information technology - Open Systems Interconnection - Connectionless Presentation protocol: Protocol specif cation. ITU-T Recommendation X.690 (1994) I
32、 ISOAEC 8825-1:1995, Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER). - - - 2.2 Paired Recommendations I International Standards equivalent in technical contents - ITU-T Recommendation X
33、.290 (19951, OSI conformance testing methodology and framework for protocol Recommendations for ITU-T applications - General concepts. ISOAEC 9646-1 : 1994, Information technology - Open Systems Interconnection - Conformance testing methodology and framework - Part 1: General concepts. ITU-T Recomme
34、ndation X.296), OS1 conformance testing methodology and framework for profocol Recommendations for ITU-T applications - Implementation conformance statements. ISOAEC 9646-7: 1995, Informution technology - Open Systems Interconnection - Conformance testing methodology and framework - Part 7: Implemen
35、tation Conformance Statements. - Presently at the stage of draft. ITU-T Rec. X.256 (1995 E) 1 ISO/IEC 9576-2 : 1995 (E) ITU-T RECflN*X.256 95 9 48b2593 0603362 2L17 3 Definitions For the purposes of this Recommendation I International Standard, the following definitions apply: 3.1 3.2 Terms defined
36、in ITU-T Rec. X.236 I ISOIEC 9576-1. The following terms defined in ITU-T Rec. X.290 I ISOAEC 9646-1: a) Implementation conformance statement; b) Implementation conformance statement proforma; c) d) PICS proforma. Protocol Implementation Conformance Statement (PICS); 3.3 Additional terms a) b) reque
37、ster: The PPM that initiates a particular action. acceptor: The PPM that accepts a particular action. 4 Abbreviations For the purposes of this Recommendation I International Standard, the following abbreviations apply: ICs Implementation Conformance Statement PICS Protocol Implementation Conformance
38、 Statement XI Protocol Control Information PDU Protocol Data Unit PDV Presentation Data Value PPDU Presentation Protocol Data Unit PPM Presentation Protocol Machine UD UnitData 5 Conformance A conforming PICS proforma shall be technically equivalent to the IT-T I ISO/IEC published PICS proforma and
39、shall preserve the numbering and ordering of the items in the IT-T I ISOAEC PICS proforma. A PICS which conforms to this ITU-T Recommendation I International Standard shall: a) b) c) describe an implementation which conforms to ITU-T Rec. X.236 I ISOAEC 9576-1; be a conforming PICS proforma, which h
40、as been completed in accordance with the instruction for completion given in A.2; include the information necessary to uniquely identify both the supplier and the implementation. 2 ITU-T Rec. X.256 (1995 E) ITU-T RECflNxX.256 95 = 4862591 0603363 LB3 ISO/IEC 9576-2 : 1995 (E) of comgenda applied to
41、this PICS proforma Protocol Implementation Conformance Statement (PICS) proforma for the connectionless presentation protocol (This annex forms an integral part of this Recommendation I International Standard) ITU-T Rec. X.256 (1995) I TSO/IEC 9576-2: 1995 Corr: com: Corr: A.l The supplier of the PI
42、CS proforma shall identify any corrigenda (Le. Technical Corrigenda or equivalent) to the published proforma that have been applied. Suppliers of the proforma should modify the proforma, or attach relevant additional pages in order to apply the corrigenda, and then record the application of the corr
43、igenda in the table below. Identification of PICS proforma corrigenda A.2 Instructions A.2.1 The purpose of this PICS proforma is to provide suppliers of implementations of ITU-T Rec. X.236 I ISO/IEC 9576-1 with a consistent means of stating which capabilities have been implemented. The proforma is
44、in the form of a questionnaire and consists of a set of items. An item is provided for each capability for which an implementation choice is allowed. Items are also provided for major mandatory capabilities for which no implementation choice is allowed. Each item includes an item number, an item des
45、cription, a status value specifying the support requirement, and room for a support answer to be provided by the supplier. This clause provides general information and instructions for completion of the proforma. Subclause A.3 is for identification of the implementation. Subclause A.4 contains the m
46、eans of specifying, at a high level, the protocol and comgenda that have been implemented. Subclause AS contains the global statement of conformance. Subclause A.6 onwards contain tables in which the supplier specifies details of the implementation options chosen. A.2.2 Symbols, terms and abbreviati
47、ons A.2.2.1 Introduction In order to reduce the size of tables in the PICS proforma, notations have been introduced. These have allowed the use of multi-column layout where the columns are headed Status, and Support. The definition of each is given below. Additionally, the following definitions appl
48、y: (PICS) item: A row in a PICS proforma table. (PICS) question: The question to be answered in the intersection of a PICS item and either a support column 0.e. “Is this item supported in the context applying to this table and column?) or supported values column (Le. “What values are supported for t
49、his item in the context applying to this table and column?) in a PICS proforma table. Purpose and structure of the proforma 2, Copyright release for PICS proformas Users of this Recommendation I International Standard may freely reproduce the PICS proforma in this annex so that it can be used for its intended purpose and may further publish the completed PICS. ITU-T Rec. X.256 (1995 E) 3 ITU-T RECMN*X*25b 95 4862.593 0603364 OIT = ISO/IEC 9576-2 : 1995 (E) status (value): An allowed entry in the status column for an item in a PICS proforma table. (
