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1、DRAFT FOR DEVELOPMENT DD ENV 41502:1991 Implementation of ENV 41502:1991 Information Systems Interconnection Character repertoires for information received from or transmitted to the Teletex Service or private information processing systems using Teletex technology Licensed Copy: London South Bank U
2、niversity, London South Bank University, Tue Dec 12 05:01:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD ENV 41502:1991 This Draft for Development was published under the authority of the Standards Board and comes into effect on 30 September 1991 BSI 04-2000 The following BSI reference relates to
3、the work on this Draft for Development: Committee reference IST/2 ISBN 0 580 20134 1 Cooperating organizations The joint European Standards Institution (CEN/CENELEC), under whose Supervision this European Prestandard was prepared, comprises the National Committees of the following countries: Austria
4、Italy BelgiumLuxembourg DenmarkNetherlands FinlandNorway FrancePortugal GermanySpain GreeceSweden IcelandSwitzerland IrelandUnited Kingdom Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:01:41 GMT+00:00
5、 2006, Uncontrolled Copy, (c) BSI DD ENV 41502:1991 BSI 04-2000i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of ENV 41502:19913 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:01:41 GMT+00:00 2006, Uncontrolled
6、 Copy, (c) BSI DD ENV 41502:1991 ii BSI 04-2000 National foreword This Draft for Development is identical with the European Prestandard ENV 41502:1991 “Information Systems Interconnection Character repertoires for information received from or transmitted to the Teletex Service or private information
7、 processing systems using Teletex technology” prepared by CEN/CENELEC whose members have committed themselves to making it available in an appropriate form. In the UK the Draft for Development is the form now chosen for ENVs in the information technology area. This Draft for Development is published
8、 under the direction of the Information Systems Technology Standards Policy Committee whose Technical Committee IST/2 has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on interpretation, or proposals for change,
9、 and to keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from BSI Sales Department, BSI, Linford Wood, Milton Keynes, MK14 6LE. After two years thi
10、s ENV will be reviewed by CEN/CENELEC members with a view to its: conversion into a European Standard (which would be implemented in the UK as a British Standard); extension once for a further two years; replacement by a revised ENV (which would be published in the UK as a revised Draft for Developm
11、ent); withdrawal. The future of this Draft for Development is therefore bound to that of the ENV and the Draft for Development will not be reviewed or developed separately. This publication is not to be regarded as a British Standard. Summary of pages This document comprises a front cover, an inside
12、 front cover, pages i and ii, the ENV title page, pages 2 to 6 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London
13、South Bank University, Tue Dec 12 05:01:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN PRESTANDARD PRENORME EUROPEENNE EUROPISCHE VORNORM ENV 41502:1991 June 1991 UDC 681.327.8:621.397.48:003.62 Descriptors: Data processing, Teleprocessing, Information interchange, Data transmission, Teletex
14、, Character sets, Coded character sets, Graphic characters, Directories, Codification English Version Information Systems Interconnection Character repertoires for information received from or transmitted to the Teletex Service or private information processing systems using Teletex technology Inter
15、connection de systmes dinformation Rpertoires et codage de caractres graphiques pour linterfonctionnement avec les services Teletex de la CEPT Kommunikation von Informationssystemen Schriftzeichenvorrat und Codierung fr die Zusammenarbeit mit CEPT Teletex-Diensten This European Prestandard (ENV) was
16、 approved by CEN/CENELEC on 1991-05-15 as a prospective standard for provisional application. The period of validity of this ENV is limited initially to three years. After two years the members of CEN/CENELEC will be requested to submit their comments, particularly on the question whether the ENV ca
17、n be converted into an EN. CEN/CENELEC members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) u
18、ntil the final decision about the possible conversion of the ENV into an EN is reached. CEN/CENELEC members are the national standards bodies and national committees, respectively, of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwa
19、y, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN/CENELEC The Joint European Standards Institution Organisation Commune Europenne de Normalisation Die Gemeinsame Europische Normungsorganisation Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN/CENELEC 1991 Copyright reserved
20、 to all CEN and CENELEC members Ref. No. ENV 41502:1991 E Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:01:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 41502:1991 BSI 04-2000 2 Foreword This European Prestandard (ENV) was developed by the working group
21、 CEN/CENELEC/IT/WG CSC (secretariat held by SIS) and originally adopted by the CEN/CENELEC members on 87-01-08. The Two-Review Enquiry on the ENV was started by the CEN/CENELEC CS on 89-01-30, the conclusion of which was for WG CSC to revise the standard. The revised standard was voted upon at a CEN
22、/CENELEC voting meeting. The result of the voting from the meeting, held on 91-04-16, was positive and the revised document has consequently been accepted as a European Prestandard. Contents Page Foreword2 0Introduction3 1Scope and field of application3 2References3 2.1Base references3 2.2Additional
23、 references3 3Definitions3 4Abbreviations3 5Scenario description3 6Conformance4 7Character repertoires5 7.1Latin repertoire for the Teletex Service5 7.2Latin repertoire for private Teletex systems5 7.3Optional supplementary Greek alphabetic repertoire5 8Identification of options5 Annex A Difference
24、from the ENV 41502 of March 19876 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:01:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ENV 41502:1991 BSI 04-20003 0 Introduction The concept and structure of Functional Standards for Information Systems Interconnec
25、tion are laid down in the CEN/CENELEC/ETSI Memorandum M-IT-01. The purpose of a Functional Standard is to recommend when and how certain information technology standards should be used. This Functional Standard specifies the character repertoire defined as S/15 in the CEN/CENELEC/ETSI Memorandum M-I
26、T-02 and an additional Greek repertoire. 1 Scope and field of application This Functional Standard is intended to be used with and identified within other functional standards that specify strings of coded graphic characters forming the information received from or transmitted to the Teletex service
27、, or for use in private information processing systems using Teletex technology. This Functional Standard shall be used in conjunction with ENV 41506. 2 References 2.1 Base references CCITT Recommendation T.61, Character repertoire and coded character sets for the international Teletex service (1988
28、). ETS 300015, Terminal equipment; requirements for teletex terminal equipment participating in the teletex service (in preparation). ENV 41503, Information systems interconnection; European graphic character repertoires and their coding (1991). ENV 41505, Information systems interconnection; Charac
29、ter repertoire and coding for line drawing (1991). ENV 41506, Information systems interconnection; Data stream formats for information received from or transmitted to the Teletex Service or private information processing systems using Teletex technology (1991). 2.2 Additional references M-IT-01, CEN
30、/CENELEC/ETSI Memorandum on the Concept and Structure of Functional Standards for Information Technology (March 1986). M-IT-02, CEN/CENELEC/ETSI Memorandum on Directory of Functional Standards (forth issue, August 1989). CEN/CENELEC Report R-IT-04, Information systems interconnection; Code transform
31、ation functions and gateway functions between information processing systems and public telematic services. 3 Definitions The terms used in this Functional Standard are defined in the references. 4 Abbreviations The abbreviations used in this Functional Standard are defined in the references. 5 Scen
32、ario description With the field of application as stated in section 1, the scenario for this Functional Standard is as follows: This Functional standard specifies four different character repertoires. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:01:41 GMT+
33、00:00 2006, Uncontrolled Copy, (c) BSI ENV 41502:1991 4 BSI 04-2000 5.1 Repertoire Option A is intended to be used for information to be received from or transmitted to the Teletex Service, comprising Latin alphanumeric and special graphic characters. 5.2 Repertoire Option B is intended to be used i
34、n private information processing systems using teletex technology. It comprises Latin alphanumeric and special graphic characters. 5.3 Either of the repertoires Option A or Option B can be combined with a supplementary repertoire of Greek alphabetic characters. Repertoire Option C comprises a Latin
35、and Greek repertoire to be used for information to be received from or transmitted to the Teletex Service, and repertoire Option D the Latin and Greek repertoire to be used in private information processing systems using teletex technology. NOTEThis Functional Standard does not describe the Teletex
36、service. In the preparation of this Functional Standard the specifications of Teletex was assumed to be as in ETS 300015. 6 Conformance 6.1 Conformance of information interchange A CC-data-element within coded information for interchange is in conformance with this Functional Standard if all the cod
37、ed representations of characters within that CC-data-element conform to the requirements of clause 7 of this Functional Standard. A claim of conformance shall identify the option adopted as specified in clause 8. 6.2 Conformance of devices A device is in conformance with this Standard if it conforms
38、 to the requirements of 6.2.1, and either or both of clauses 6.2.2 and 6.2.3 below. A claim of conformance shall identify the documents which contains the description specified in clause 6.2.1 and shall identify the option adopted. 6.2.1 Device description A device that conforms to this Functional S
39、tandard shall be the subject of a description that identifies the means by which the user may supply characters to the device, or may recognize them when they are made available to him, as specified respectively in clauses 6.2.2 and 6.2.3 below. 6.2.2 Originating devices An originating device shall
40、allow its user to supply any sequence of characters conforming to the adopted option of this Functional Standard, and shall be capable of transmitting their coded representations within a CC-data-element. 6.2.3 Receiving device A receiving device shall be capable of receiving and interpreting any co
41、ded representation of characters that are within a CC-data-element, and that conforms to clause 6.1 of this Functional Standard, and shall make the corresponding characters available to its user in such a way that its user can identify them from among those of the adopted option, and can distinguish
42、 them from each other. The conformance clauses rely on the following generalized definitions: CC-data-element: An element of interchanged information that is specified to consist of sequences of coded representations of characters, in accordance with one or more identified standards of coded charact
43、er sets. Device: A component of information processing equipment which can transmit, and/or can receive, coded information within CC-data-elements. (It may be an input/output device in the conventional sense, or a process such an application program or gateway function.) User: A person or other enti
44、ty that invokes the services provided by a device. (This entity may be a process such as an application program if the “device” is a code convertor or a gateway function, for example.) Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:01:41 GMT+00:00 2006, Unco
45、ntrolled Copy, (c) BSI ENV 41502:1991 BSI 04-20005 7 Character repertoires 7.1 Latin repertoire for the Teletex Service The Latin repertoire for the Teletex service (repertoire Option A) comprises 308 graphic characters as follows: the 234 Latin alphabetic characters, and the 74 non-alphabetic chara
46、cters, listed in clauses 3.2.2 and 3.2.3 of CCITT Recommendation T.61. 7.2 Latin repertoire for private information processing systems using teletex technology The Latin repertoire for private information processing systems using teletex technology (repertoire Option B) comprises 347 graphic charact
47、ers: the 308 characters according to clause 7.1 of this Functional Standard, the following 10 characters from the repertoire denoted as S/14 in ENV 41503: the 29 linedrawing characters denoted as repertoire S/18 in ENV 41505. 7.3 Optional supplementary Greek alphabetic repertoire The supplementary G
48、reek alphabetic repertoire comprises 70 characters: the 69 Greek alphabetic characters according to clause E.3.1.1.3.2 of CCITT Recommendation T.61, the diacritical mark DIAERESIS WITH ACUTE ACCENT used as a separate graphic character. The supplementary Greek alphabetic repertoire is used together w
49、ith either the repertoire of clause 7.1 (forming repertoire Option C), or with the repertoire of clause 7.2 (forming repertoire Option D). 8 Identification of options If a reference to this Functional Standard is made for specification purposes in another Functional Standard, the repertoire shall be clearly identified. The following table summarizes the options defined by this Functional Standard. SM07REVERSE SOLIDUS SM11LEFT CURLY BRACKET SM14RIGHT CURLY BRACKET NS01 1 SUPERSCRIPT ONE SM53(R)REGISTERED SIGN SM52(C)COPYRIGHT SIGN