1、INTERNATIONAL STANDARD ISOAEC 9834-4 First edition 1991-12-15 Information technology - Open Systems Interconnection - Procedures for the operation of OSI Registration Authorities - Part 4: Register of VTE Profiles Technologies de /information - lnterconnexion de syst6mes ouverts - ProcCdures pour de
2、s organismes denregistrement OS/ particuliers - Pariie 4: Enregistrement des protils de ferminaux virtue/s VTE Reference number ISOllEC 9834-4:1991(E) ISO/IEC 9834-4 : 1991 (E) CONTENTS Page Foreword . iii Introduction . iv Scope . 1 Normative references 1 Definitions . 1 Abbreviations . 2 Subcommit
3、tee 2 Role of Registration Authority 2 Contents of Register Entries 2 Format of Register Entries . 2 Pan 1 applicability 2 10 Activity 2 11 Change . 2 12 Availability 2 Annexes 3 A Form of register entries 3 B Example of register entry 5 0 ISO/IEC 1991 All rights reserved. No pan of this publication
4、 may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and micro- film, without permission in writing from the publisher. ISO/IEC Copyright Office l Case postale 56 l CH-1211 Geneve 20 0 Switzerland Printed in Switzerland ii ISO/IEC 9834-4 : 1991
5、 (E) Foreword IS0 (the International Organization for Standardization) and IEC (the International Electrotechnical 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 t
6、echnical committees established by the respective organization to deal with particular 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
7、take pat-l in the work. In the field of information technology, IS0 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 bod- ies for voting. Publication as an International Standard req
8、uires ap- proval by at least 75 % of the national bodies casting a vote. International Standard ISO/IEC 9834-4 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 techno/ogy - Open System
9、s interconnection - Procedures for the operation of OS/ Registration Authorities: - Pati I: General procedures - Part 2: Registration procedures for OS/ document types - Part 3: Regisfration of object identifier component values for joint ISO-CCITT use - Part 4: Register of VTE Profiles - Part 5: Re
10、gister of VT Control Object Definitions - Part 6: Registration of AP tit/es and AE tit/es Annex A forms an integral part of this part of ISO/IEC 9834. Annex B is for information only. . . . III ISO/IEC 9834-4 : 1991 (E) Introduction The Open Systems interconnection (OSI) Standards for Basic Class Vi
11、rtual Terminals (VT), IS0 9040 and IS0 9041-l) have a requirement for a) unambiguous names for the identification and definition of registered VTE- profiles; and b) a register of VTE-profile definitions. This pan of ISO/IEC 9834 specifies the procedures to be followed in preparing and maintaining a
12、register of VTE-profiles and their names. Such registers can be maintained by any organisation capable of allocating ASN.l object identifier values. This part of ISO/IEC 9834 also specifies the procedures for preparing and maintaining the International Register. INTERNATIONAL STANDARD ISO/IEC 9834-4
13、 : 1991 (E) Information technology - Open Systems Interconnection - Procedures for the operation of 0% Registration Authorities - Part4 : Register of VTE Profiles 1 Scope This part of ISO/IEC 9834 specifies the contents of register entries recording information about VTE-profiles and assig- ning una
14、mbiguous names of ASN.l type OBJECT IDENTI- FIER to VTE-profile definitions. The VTE-profiles in this regis- ter are defined for use with implementations of VT protocols claiming to conform to IS0 9041-l. The VTE-profile names to which this document refers are for use in fields of the VT communicati
15、on protocol defined in IS0 9041-l which need to identify the VTE-profiles defined in the register entries. A name registered in accordance with this pan of ISO/IEC 9834 shall serve as an identification of the VTE-profile associated with it in the register. The presence of a register entry in the Int
16、ernational Register carries no implications of required support for that VTE-profile in any Virtual Terminal implementation. NOTE - Nonetheless, within a VTE-profile entry, requirements may be expressed relating to implementations claiming to support that entry (such requirements are described in cl
17、ause A.lO). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO/IEC 9834. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements bas
18、ed on this part 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, Information technology - Open Systems Inte
19、rconnection - 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 - Virtual Terminal Basic Class Protocol-Part 7
20、: Specification ISO/IEC 9834-l : 1991, Information technology - Open Sys- tems Interconnection - Procedures for the operation of OSI Registration Authorities - Part 1: General procedures. ISO/IEC 9834-5 : 1991, Information technology - Open Sys- tems Interconnection - Procedures for the operation of
21、 OS/ Registration Authorities - Part 5: Register of VT Control Object Definitions. 3 Definitions For the purposes of this pan of ISO/IEC 9834, the following terms are used which are defined in IS0 9040. a) VT-association b) VT-functional-unit c) VT-mode 1 ISO/IEC 9834-4 : 1991 (E) d) VTE-parameter 4
22、 VTE-profile 9 registered VTE-profile 9) profile argument f-0 special profile argument 0 service parameter j) display object k) control object 0 device object 4 mode, A-mode, S-mode 4 Abbreviations For the purposes of this part of ISO/IEC 9834, the following abbreviations apply. VTE Virtual Terminal
23、 Environment IS0 International Organisation for Standardisation OSI Open Systems Interconnection ASN.l Abstract Syntax Notation One 5 Subcommittee The responsible subcommittee shall be ISO/IEC JTCl/SC21. 6 Role of Registration Authority The Registration Authority performs a technical role in ensur-
24、ing that entries conform to this part of ISO/IEC 9834 and represent useful and clear specifications. 7 Contents of Register Entries The contents of Register Entries are specified in annex A. 8 Format of Register Entries Register Entry proposals shall be in the form specified in annex A. 9 Part 1 app
25、licability All clauses of ISO/IEC 9834-l shall appty. 10 Activity The volume of activity is not expected to exceed five 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, a
26、nd shall follow similar procedures, to that used for the agreement of an International Standard, except that final approval by ISO/IEC Councils is not required. 12 Availability Copies of Register Entries shall be made available to any requester by the Registration Authority. 2 ISO/IEC 9834-4 : 1991
27、(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 in the corresponding text below. NOTE - An example of a register entry appears in annex B, and should be consulted as
28、 this annex is 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 identification of the register entry within the scope of the authority maintaining the register, but not outside it. An
29、 example is: ISO- the ninth register entry for VTE-profiles. 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 proposal was first s
30、ub- 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 ASN.l type OBJECT IDENTIFIER which identifies the VTE-profile defined by this register entry, and which is used in the profile identifier field of the VT pro
31、tocol elements which reference this profile. NOTE - Values of the ASN.1 type OBJECT IDENTIFIER pro- vide globally unambiguous identification of information ob- jects, and are never re-used. Where an OSI VTE-Profile register entry is copied with no technical change from one register to a different on
32、e, 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 reused to identify a different object. New object identifiers allocated by the International Registra- tio
33、n Authority for VTE-profiles shall be of the form: iso standard 9834 vte-profile(4) x where x is the number of the VTE-profile in the International Register. Object identifiers which are allocated by other registration authorities may be of any form permitted to them under ISO/IEC 8824 but subject t
34、o 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, changes to this clause shall be regarded as editorial, not technical. Th
35、e ObjectDescriptor value provides human-readable text describing the VTE-profile covered by the register entry. It should be chosen to provide a high probability of globally unambiguous identification of the VTE-profile, but this cannot be guaranteed. A.6 Mode This clause states which mode of operat
36、ion (A or S) this registered profile is designed for. A.7 VT functional units This clause states which VT-functional-units are required, which are optional and which are prohibited for operation using this registered VTE-profile. A.8 Profile arguments This clause lists the profile arguments that are
37、 associated with this registered VTE-profile and defines them. By convention, profile arguments are named “rl”, “R”.“rn”. In most cases, a profile argument is directly equivalent to a VTE-parameter (in the directed graph) and this relationship shall be indicated in the profile argument definition. A
38、 value type and/or range may be given. Special profile arguments have no direct equivalents in the directed graph and shall be given a local identifier number (ASN.l INTEGER type) which has a significance particular to this registered VTE-profile. Symbolically they take the form Pp-1, Pp-2Pp-n. The
39、value type of a special profile argu- ment is specified. Profile arguments may have default values specified by the VTE-profile. For arguments which map to VTE-parameters, the profile argument default may be defined independently from the parameter default defined in IS0 9040 for the associ- ated WE
40、-parameter. The VI-E-profile may also reference the VTE parameter default for use as the profile argument default. Special profile arguments may have any valid value specified as a default. 3 ISOhEC 9834-4 : 1991 (E) The existence and value of profile argument defaults should be included in this cla
41、use of the register entry. A.9 VTE-profile body The main body of the VTE-profile definition is presented in a BNF style notation or in any other suitable notation. Some VTE-parameters are given unique values by the profile defini- tion. Other VTE-parameters are subject to evaluation by a profile arg
42、ument. All VTE-parameters shall be specified in the VTE-profile body irrespective of the defautts defined in the standards. This means that users of the register will be able to obtain all the necessary information from one place. Some of the VTE-parameters in the directed graph, e.g. mode and funct
43、ional-units, are assigned values by the service par- ameters VT-mode and VT-functional-units in VT-ASSOCIATE and, therefore, do not appear in the VTE-profile definitions, The following symbols are used in the BNF-style notation: 0 enclose a grouping for syntactic purposes; there is no implication of
44、 optional repetition. indicates conditional occurrence of a piece of the VTE-profile dependent usually on a special profile argument of boolean type. It is possible to define VT control objects in a VTE-profile. Where such a control object may be of more general use and may be used in more than one
45、WE-profile, it is recommended that it be registered separately in the register of VT Control Objects (see ISC/IEC 98844). Where a CO is defined in a VTE-profile, each parameter associated wlth the CO shall be defined and the contents, semantics and where applicablethe update syntax shall be defined
46、(see ISO/IEC 9884-5 for examples of CO definition). A.1 0 Additional information Additional notes are included here, as necessary, to state any conditions on the use of the VTE-profile. Requirements may be specified here to be placed on any implementation which claims to support the registered VTE-
47、profile. separates elementary or grouped parameters in a list. This clause is optional and if present is normative. encloses an explanatory comment. ends the syntactic block. A.11 Usage A typical use of the VTE-profile is given here for information only. This clause is mandatory. IF.THEN ISO/IEC 983
48、4-4 : 1991 (E) Annex B (informative) Example of register entry 1 Entry number ISO- 2 Name of sponsoring body The sponsoring body is ISO/IEC JTCl/SC21/WG5 3 Date The date of submission of this proposal is November 17th 1991. 4 Identifier iso standard 9834 vteprofile(4) 3) 5 Descriptor value “S-mode s
49、ingle bounded page with optional printer” 6 Mode Use of this profile requires S-mode to have been selected. 7 VT functional units The kernel functional unit is required for operation with this VTE-profile. 8 Profile arguments This VTE-profile has three arguments. Profile argument rl is mandatory and enables negotiation of avaluefortheVTE-parametersx-boundanddevice-minimum- x-array-length. It takes an integer value greater than zero. Profile argument r2 is optional and enables the negotiation of a value for the VTE-parameters y-bound and device-mini- mum-y-array-length. It takes a valu
