ISO/IEC INTERNATIONAL STANDARD 10026-6 First edition 1995-07-01 Information technology Open Systems Interconnection - Distributed Transaction Processing -- Part 6: UnstructuredData Transfer Technologies de I'information Interconnexion de systemes ouverts (OSl) -Traitement transactionnel réparti- Partie 6: Transfert de données non structure IEC Referencenumber ISO/IEC 10026-6:1995(E) Copyright Intemational Organization for Standardization No repr Ise from IHS Not for Resale ISO/IEC 10026-6:1995(E) Foreword ISO (the International Organization for Standardization) and IEC (the Inter- national Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. International Standard ISO/IEC 10026-6 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 21, Open systems interconnection, data management and open distributed processing. ISO/IEC 10026 consists of the following parts, under the general title Information technology OpenSystemsInterconnection DistributedTransaction Processing: Part I: OSI TP Model Part 2: OSI TP Service -Part3:Protocol specification - Part 4: Protocol Implementation Conformance Statement (PICS) proforma - Part 5: Application context proforma and guidelines when using OSI TP - Part 6: Unstructured Data Transfer Annex A forms an integral part of this part of ISO/IEC 10026. Annexes B and C are for information only. @ISO/IEC 1995 All rights reserved. Unless otherwise specified, no part of this publication may. be photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office · Case postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii ed without license from IHS Not for Resale ISO/IEC ISO/IEC 10026-6:1995(E) Introduction ISO/IEC 10026 is one of a set of standards produced to facilitate the interconnection of computer systems. It is related to other Model subdivides the area of standardization for interconnection into a series of layers of specification, each of manageable size. standards,theinterconnectionofcomputersystems a) from different manufacturers; b) under different management; c) of different levels of complexity; and d) of different technologies. ISO/IEC 10026-1, -2 and -3 define the OSI TP Model, OSI TP Service and OSI TP Protocol available within the Application Layer of the OSI Reference Model. ISO/IEC 10026-4 is the OSI TP PICS and ISO/IEC 10026-5 defines the Application Context Proforma and Guidelines When Using OSI TP. This part of ISO/IEC 10026 defines a model for unstructured data transfer within the OSI TP environment. UDT operates within the constraints specified for U-ASEs in ISO/IEC 10026. UDT is not suitable for use outside the OSI TP environment. ili ed without license from IHS Not for Resale