1、INTERNATIONAL STANDARD ISOAEC 9834-5 First edition 1991-12-15 Information technology - Open Systems Interconnection - Procedures for the operation of OSI Registration Authorities - Part 5: Register of VT Control Object Definitions Technologies de /information - Interconnexion de systmes ouverts - Pr
2、ocCdures pour des organismes denregistrement OS1 particuliers .- Partie 5: Enregistrement des objets de contrcile VT Reference nurnber ISO/IEC 9834-5:1991(E) ISO/IEC 9834-5 : 1991 (E) CONTENTS Page * Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv 1 scope . 1 2 Normative references 1 3 Definitions . 2 4 Abbreviations . 2 5 Subcommittee 2 6 Role of Registration Authorii 2 7 Contents of Register Entries 2 6 Format of Register Entries . 2 9 Part 1 applic
5、ability 2 10 Activity 2 11 Change . 2 12 Availability . 2 13 Sub-registers . 2 ANNEXES . 3 A Form of register entries 3 B Examples of register entries . 6 (3 ISO/IEC 1991 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechani
6、cal, including photocopying and micro- film, without permission in writing from the publisher. ISO/IEC Copyright Office 0 Case postale 56 l CH-1211 Genke 20 0 Switzerland Printed in Switzerland ISO/IEC 9834-5 : 1991 (E) Foreword IS0 (the International Organization for Standardization) and IEC (the I
7、nternational Electrotechnicai Commission) form the specialized system for worldwide standardization. National bodies that are members of IS0 or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particula
8、r fields of technical activity. IS0 and IEC technical com- mittees collaborate in fields of mutual interest. Other international or- ganizations, governmental and non-governmental, in liaison with IS0 and IEC, also take part in the work. In the field of information technology, IS0 and IEC have estab
9、lished a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bod- ies for voting. Publication as an International Standard requires ap- proval by at least 75 % of the national bodies casting a vote. International
10、 Standard ISO/IEC 9834-5 was prepared by Joint Technical Committee ISO/IEC JTC 1, information technology. ISO/IEC 9834 consists of the following parts, under the general title In- formation technology - Open Systems Interconnection - Procedures for the operation of OS/ Registration Authorities: - Pa
11、rt 1: General procedures - Part 2: Registration procedures for OS/ document types - Part 3: Registration of object identifier component values for joint /SO-CCITT use - Part 4: Register of VTE Protiles - Part 5: Register of VT Control Object Definitions - Part 6: Registration of AP titles and AE tit
12、les Annex A forms an integral part of this part of ISO/IEC 9834. Annex B is for information only. . . . III ISO/IEC 9834-5 : 1991 (E) Introduction The Open Systems Interconnection (0%) Standards for Basic Class Virtual Terminals (VT), IS0 9040 and IS0 9041-1, have a requirement for a) unambiguous na
13、mes for the identification and definition of registered VT Con- trol Objects; and b) a register of VT Control Object type definitions. This part of ISO/IEC 9934 specifies the procedures to be followed in preparing and maintaining a register of VTE COs and their names. Such registers can be maintaine
14、d by any organisation capable of allocating ASN.l object identifier values. This pan of ISO/IEC 9934 also specifies the procedures for preparing and maintaining the Inter- national Register. INTERNATIONAL STANDARD ISO/lEC 9834-5 : 1991 (E) Information technology - Open Systems Interconnection - Proc
15、edures for the operation of OSI Registration Authorities - Part 5 : Register of VT Control Object Definitions 1 Scope This pan of ISO/IEC 9834 specifies the contents of register entries recording information about VT control object Defini- tions and assigning unambiguous names of ASN.l type OB- JECT
16、 IDENTIFIER to VT CO Definitions. The VTCOs specified in this register are defined for use with implementations of VT protocols claiming to conform to IS0 9041-l. The VTE CO names to which this document refers are for use in fields of the VT communication protocol defined in IS0 9041-l which need to
17、 identify the VT CO definitions defined in the register entries. A name registered in accordance with this part of ISOIEC9834 shall serve as an identification of the VT CO definition associ- ated with it in the register. The presence of a register entry in the International Register carries no impli
18、cations of required support for that VT CO definition in any Virtual Terminal implementation. NOTE - Nonetheless, within a VT CO definition entry, require- ments may be expressed relating to implementations claiming to support the entry. The requirement for registration for the following CO classifi
19、- cation has been identified in IS0 9040: - Field Entry Instruction COs (FEICOs) - Field Entry Pilot COs (FEPCOs) - Reference Information Objects (RlOs) - Termination Conditions COs (TCCOs) In addition there is a requirement for the registration of miscel- laneous COs. Future VT standards may identi
20、fy registration requirements for new CO classifications. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this pan of ISO/IEC 9834. At the time of publication, the editions indicated were valid. All standards are subjec
21、t to revision, and parties to agreements based on this pan of ISO/IEC 9834 are encour- aged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards ISO/IEC 8824 : 1990,
22、Information technology - Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN. 1). IS0 9040 : 1990, Information technology - Open Systems Interconnection - Virtual Terminal Basic Class Service. IS0 9041-l : 1990, information technology - Open Systems Interconnection - Vi
23、rtual Terminal Basic Class Protocol-Part 1: Specification ISO/IEC 9834-l : 1991, Information technology - Open Sys- tems Interconnection - Procedures for the operation of OSI Registration Authorities - Part 1: General procedures. 1 ISO/IEC 9834-5 : 1991 (E) 3 Definitions For the purposes of this pan
24、 of ISO/IEC 9884, the following terms are used which are defined in IS0 9040. a) b) cl 4 e) 9 9) t-0 0 j) k) 1) ml 4 0) PI 9) 0 s) 9 VT-association WE-parameter service parameter display object control object device object Field Field Definition Control Object Field Definition Record Field Entry Ins
25、truction Control Object Field Entry Instruction Record Field Entry Instruction Field Entry Pilot Control Object Field Entry Pilot Record Context Control Object Reference Information Object Termination Condition Control Object Field Entry Event Field Entry Condition Field Entry Reaction 4 Abbreviatio
26、ns For the purposes of this part of ISO/IEC 9884, the following abbreviations apply. VT VTE IS0 OSI ASN.l co FDCO FDR FEICO FEIR FEI FEPCO FEPR FEE FEC FER cc0 RIO TCCO Virtual Terminal Virtual Terminal Environment International Organisation for Standardisation Open Systems Interconnection Abstract
27、Syntax Notation One Control Object Field Definition Control Object Field Definition Record Field Entry Instruction Control Object Field Entry Instruction Record Field Entry Instruction Field Entry Pilot Control Object Field Entry Pilot Record Field Entry Event Field Entry Condition Field Entry React
28、ion Context Control Object Reference Information Object Termination Conditions Control Object 5 Subcommittee The Responsible subcommittee shall be ISO/IEC JTCl/SC 21. 6 Role of Registration Authority The Registration Authorii performs a technical role in ensur- ing that entries conform to this pan o
29、f ISO/IEC 9884 and represent useful and clear specifications. 7 Contents of Register Entries The contents of Register Entries is specified in annex A. 8 Format of Register Entries Register Entry proposals shall be in the form specified in annex A. 9 Part 1 applicability All clauses of ISO/IEC 9884-l
30、 shall apply. 10 Activity The volume of activity is not expected to exceed 20 registra- tions per year. 11 Change Inclusion or modification or deletion of register entries in the International Register shall require the same consensus of IS0 Member Bodies, and shall follow similar procedures, to tha
31、t used for the agreement of an International Standard, except that final approval by ISO/IEC Councils is not required. 12 Availability Register Entries shall be made available to any requestor by the Registration Authorii. 13 Sub-registers The International Register shall consist a number of sub-reg
32、- isters each of which corresponds to a major classification of VT Control Object. These are - Miscellaneous COs; - FEICOs; - FEPCOs; - RlOs; - TCCOs. New control object types may be defined in future amend- ments to IS0 9040 or in future VT standards. The registration requirements for these CO type
33、s shall be specified in those standards so that this part of ISO/IEC 9884 need not be updated. ISO/IEC 9834-5 : 1991 (E) ANNEX A (normative) Form of register entries The headings of this annex are those that shall be used in the register entry. The contents of each clause and sub-clause are defined
34、in the corresponding text below. NOTE - Examples of register entries appear in annex B, and should be consulted as this annex is now read. A.1 Entry number The form of this clause is determined by the authority main- taining the register. It is intended for human use only, and provides unambiguous i
35、dentification of the register entry within the scope of the authority maintaining the register, but not outside it. Examples are: - MISCO-03 The third register entry for miscellan- eous COs; - FEICO-05 The fifth register entry for FEICOs; - FEPCO-11 The eleventh register entry for FEPCOs; - RIO-06 T
36、he sixth register entry for RlOs; - TCC0-07 The seventh register entry for TCCOs. A.2 Name of sponsoring authority This clause shall contain the name of the sponsoring authority (as defined in ISO/IEC 9834-l) which was the proposer of the register entry. A.3 Date This clause shall contain the date a
37、 proposal was first sub- mitted to the responsible subcommittee, or the date of appro- val of a register entry. A.4 Identifier This clause specifies a value of the ASNl type OBJECT IDENTIFIER which identifies the VT CO defined by this register entry, and which is used in the CO-type-identifier field
38、 of the VT protocol elements which reference this CO. NOTE - Values of the ASN.l type OBJECT IDENTIFIER pro- vide globally unambiguous identification of information ob- jects, and are never re-used. Where an OSI VT CO definition register entry is copied with no technical change from one register to
39、a different one, the object identifier value originally allocated may be retained to identify the same object in the new register or a new value may be allocated. The old object identifier value shall not be re-used to identify a different object. New object identifiers allocated by the internationa
40、l Registra- tion Authority for VT control object types shall be of the form: iso standard 9834 vt-co-def(5) reg(x) y where: a) reg(x) identifies the sub-register and takes the following values: - reg(x) = 0 - misco(0); - reg(x) = 1 - feico(1); - reg(x) = 2 - fepco(2); - reg(x) = 3 - rio(3); - w(x) =
41、 4 - tcco(4). Values for new sub-registers shall be defined in future VT standards which identify new classifications of CO for regis- tration; and b) y is the number of the VT control object type in the International Sub-Register. Object identifiers which are allocated by other registration authori
42、ties may be of any form permitted to them under ISO/IEC 8824 but subject to qualification by ISO/IEC 9834-l. A.5 Descriptor value This clause specifies a value of ASN.l ObjectDescriptor which is to be associated with the identifier in clause A.4. Where entries are copied from one register to another
43、, changes to this clause shall be regarded as editorial, not technical. The ObjectDescriptor value provides human-readable text describing the VT CO Definition covered by the register entry. It should be chosen to provide a high probability of globally unambiguous identification of the VT CO Definit
44、ion, but this cannot be guaranteed. 3 ISO/IEC 9834-S : 1991 (E) A.6 CO parameters Table A.1 defines the VTE parameters which specify the CO. The following notation is used in the table to signify the status of the entrries: 0” = Mandatory; = Optional; C = Conditional; - = CO parameter does not map t
45、o a VT Parameter. Table A.1 - CO Parameters CO type :O parameter CO-name Miscellaneous parametric single element CO - Miscellaneous parametric multi-element CO - miscellaneous non-parametric CO - FEICO FEPCO RIO - CO-type-identifier CO-structure CO-access CO-priority CO-trigger CO-element-id - - 0 (
46、see note 1) 0 (see note 1) 0 (see note 1) - - M positive integer 0 (see note 1) 0 (see note 1) (see nOde 1) M positive integer - M “non-parametric” 0 (see note 1) 0 (see note 1) 0 (see note 1) - - - 0 (see note 1) 0 (see note 1) 0 (see note 1) - CO-category 0 0 default “boolean” default “boolean” -
47、- (see note 2) (see note 2) CC b) the number, category (transparent or character), natural language description of the semantics and option- ally initial values for the remaining elements are defined. A.8 Additional information Additional notes are included here, as necessary, to state any condition
48、s on the use of the CO, for example its dependence on values of “global” parameters of the VT-association such as VT-mode and on values of specific VTE-parameters. Requirements may be specified here to be placed on any implementation which claims to support the registered VT CO definition. This clause is optional and if present is normative. A.9 Usage A typical use of the CO is given here for information only. This clause is mandatory. 5
