1、I NTE R NAT I O N AL TELECOM M U N I CAT I ON U N I ON ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU TELEMATIC SERVICES TERMINAL EQUIPMENTS AND PROTOCOLS FOR TELEMATIC SERVICES T.53 (04/94) CHARACTER CODED CONTROL FUNCTIONS FOR TELEMATIC SERVICES ITU-T Recommendation T.53 (Previously “CCIlT
2、Recommendation”) ITU-T RECMN*T.53 94 4862591 0592938 632 FOREWORD The IT-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommen- dations
3、 on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The ap
4、proval of Recommendations by the Members of the IT-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, March 1-12, 1993). ITU-T Recommendation T.53 was prepared by ITU-T Study Group 8 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 7th of April 1
5、994. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1994 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, elec
6、tronic or mechanical. including photocopying and microfilm, without permission in writing from the ITU. ITU-T RECMN*T.53 94 I 4Ab259L 0592939 579 CONTENTS Page 1 scope 1 1.1 General 1 1.2 The ITU-T 1 2 Nonnative references 2 2.1 Identical Recommendations I International Standards 2 Paired Recommenda
7、tions I International Standards equivalent in technical content 2.3 Additional references 2 3 Definitions 3 4 Abbreviations and acronyms 7 4.1 Abbreviations 7 4.2 Acronyms 7 5 Device concepts 7 . 7 6.1 Notation 8 6.2 Names 8 . . 2.2 2 . 6 Notation and Names . 8 7 Code extension techniques . 8 Types
8、of control functions . 8.1 Elements of the CO Set 8.2 Elements of the C1 Set 8.3 Control sequences . 8.4 Independent control functions 8.5 Control strings 8.6 Not an element of any set . 8.7 Notation 8 8 9 9 9 9 10 10 9 10 10 Concepts relating to text formatting 11 Categories of control functions co
9、nsidered in this Recommendation 10.1 Formatted content / page-image format (PIF) 11 10.2 Processable content . 12 10.3 Formatted processable content (formattable content) . 12 11 Repertoire of control functions 11.1 Delimiters . 11.2 Device control functions . 11.3 Display control functions 11.4 For
10、mat effectors 11.5 Information separators 1 1.6 Introducers 11.7 Miscellaneous control functions . 11.8 Presentation control functions 11.9 Shift functions . 11.10 Transmission control functions . 12 13 13 14 14 16 16 17 17 19 20 12 Definition of control functions . 20 12.1 ACKNOWLEDGE (ACK) . 20 12
11、.2 AUXILIARY DEVICE OFF (ADF) 20 12.3 AUXILIARY DEVICE ON (ADO) . 21 Recommendation T.53 (04D4) 1 . 12.4 12.5 12.6 12.7 12.8 12.9 12.10 12.11 12.12 12.13 12.14 12.15 12.16 12.17 12.18 12.19 12.20 12.21 12.22 12.23 12.24 12.25 12.26 12.27 12.28 12.29 12.30 12.3 1 12.32 12.33 12.34 12.35 12.36 12.37 1
12、2.38 12.39 12.40 12.41 12.42 12.43 12.44 12.45 12.46 12.47 ACTIVATE IMPLICIT SCROLLING (AIS) . ACTIVE POSITION ADDRESSING (APA) . ACTIVE POSITION BACKWARD (APB) . ACTIVE POSITION DOWN (APD) . ACTIVE POSITION FORWARD (APn . ACTIVE POSITION HOME (APH) ACTIVE POSITION RETURN (APR) ACTIVE POSITION SET (
13、APS) . ACTIVE POSITION UP (APU) . BELL (BEL) . BREAK PERMTITED HERE (BPH) . CANCEL (CAN) . i CURSOR OFF (COF) . CURSOR ON (CON) . CARRIAGE RETURN (CR) CLEAR SCREEN (CS) CONTROL SEQUENCE INTRODUCER (CSI) . DEVICE CONTROL ONE Cl) . DEVICE CONTROL TWO C2) . DEVICE CONTROL THREE C3) . DEVICE CONTROL FOU
14、R C4) =. . DIS PLAY DEVICE OFF DF) DISPLAY DEVICE ON DO) . DELETE (DEL) BACKSPACE (BS) DEACTIVATE IMPLICIT SCROLLING (DIS) . DATA LINK ESCAPE LE) . EMPTY BUFFER (EBU) . EXTENDED DEVICE CONTROL TWO (EDC2) EXTENDED DEVICE CONTROL THREE (EDC3) EXTENDED DEVICE CONTROL ONE (EDC1) . EXTENDED DEVICE CONTRO
15、L FOUR (EDC4) ENQUIRY (ENQ) END OF TRANSMISSION GOT) END OF TRANSMISSION BLOCK (ETB) END OF TEXT (Em . FORM FEED (FF) FONT SELECTION O GRAPHIC CHARAcfw COMBINATION (GCC) GRAPHIC SIZE MODIFICATION (GSM) . GRAPHIC SIZE SELECTION (GSS) HARD COPY START (HCS) HARD COPY STOP (Hm . ESCAPE (ESC) Recommendat
16、ion T.53 (494) Page 21 21 21 21 21 22 22 22 22 22 22 23 23 23 23 23 24 24 24 25 25 25 25 25 25 26 26 26 26 26 26 26 27 27 27 27 27 27 28 28 28 29 29 29 . ITU-T RECMNUT.53 94 4862591i 0592743 127 12.48 12.49 12.50 12.51 12.52 12.53 12.54 12.55 12.56 12.57 12.58 12.59 12.60 12.61 12.62 12.63 12.64 12.
17、65 12.66 12.67 12.68 12.69 12.70 12.71 12.72 12.73 12.74 12.75 12.76 12.77 12.78 12.79 12.80 12.81 12.82 12.83 12.84 12.85 12.86 HARD COPY WAIT (HCW) . CHARACTER POSITION BACKWARD (HPB) . CHARACTER POSITION FORWARD (HPR) . CHARACTER TABULATION (HT) INFORMATION SEPARATOR ONE (US - UNIT SEPARATOR) (IS
18、1) . INFORMATION SEPARATOR TWO (IS2) - RECORD SEPARATOR) (RS) . INFORMATION SEPARATOR THREE (IS3) GROUP SEPARATOR (GS) . INFORMATION SEPARATOR FOUR (IS4) mE SEPARATOR (FS) . JUSTIFY (JFY) LINE FEED (LF) LOCKING-SHIFT ZERO (LSO) LOCKING-SHIFT ONE (LS 1) LOCKING-SHIFT ONE RIGHT (LS 1R) . LOCKING-SHIFT
19、 TWO (LS2) LOCKING-SHIFT TWO RIGHT (LS2R) LOCKING-SHIFT THREE S3) . LOCKING-SHIFT THREE RIGHT S3R) NEGATIVE ACKNOWLEDGE (NAK) NO BREAK HERE (NBH) NON-SELECTIVE RESET (NSR) NULL (NUL) PAGE FORMAT SELECTION (PFS) . IDENTIFY GRAPHIC SUBREPERTOIRE UGS) PARTIAL LINE FORWARD (PLD) . PARTIAL LINE BACKWARD
20、(PLU) RECORDING DEVICE START (RDS) RECORDING DEVICE STOP (RDT) . RECORDING DEVICE WAIT (RDW) . REPEAT (REP) REVERSE LINE FEED (RI) REPEAT TO END OF LINE (ROL) REPEAT CONkOL (RPC) PARALLEL TEXTS (PTX) . REPEAT 0 SET ADDITIONAL CHARACTER SEPARATION (SACS) . SELECT ALTERNATIVE PRESENTATION VARIANTS (SA
21、FV) . SCROLL DOWN (SCD) SCROLL OFF (SCF) SCROLL ON (SCN) . Page 29 30 30 30 30 31 31 31 31 32 32 32 33 33 33 33 34 34 34 34 34 34 35 36 36 36 37 38 38 38 38 38 39 39 39 39 40 41 41 Recommendation T.53 (W4) iii ITU-T RECMN*T-53 94 4862593 0592942 Ob3 12.87 12.88 12.89 12.90 12.91 12.92 12.93 12.94 12
22、.95 12.96 12.97 12.98 12.99 12.100 12.101 12.102 12.103 12.104 12.105 12.106 12.107 12.108 12.109 12.1 10 12.111 12.1 12 12.1 13 12.1 14 12.1 15 12.1 16 12.1 17 12.118 SELECT CHARACTER ORIENTATION (SCO) . SET CHARACTER SPACING (SCS) . SCROLL UP (SCU) . SELECT GRAPHIC RENDITION (SGR) . SELECT CHARACT
23、ER SPACING (SHS) SHIFT-IN (SI) SELECT IMPLICIT MOVEMENT DJRECTION (SIMD) . SET LINE HOME (SLH) . SET LINE LIMIT (SLL) SET LINE SPACING (SLS) START DIRECTED STRING (SDS) . sm-OUT (SO) . START OF HEADING (SOH) . START OF STRING (SOS) . SPACE (SP) SELECT PRESENTATION DIRECTIONS (SPD) . SET REDUCED CHAR
24、ACTER SEPARATION (SRCS) . START REVERSED STRING (SRS) SELECT SIZE UNIT (SSU) . SET SPACE WIDTH (SSW) SINGLE-SHIFT TWO (SS2) . SINGLE-SHIFT THREE (SS3) STRING TERMINATOR (ST) SELECTIVE TABULATION (STAB) SUBSTITUTE (SUB) . SELECT LINE SPACING (SVS) . SYNCHRONOUS IDLE (SYN) . LINE POSITION BACKWARD (VP
25、B) LINE POSITION FORWARD (VPR) WORD WRAP OFF 0 WORD WRAP ON 0 . START OF TEXT (STX) . Annex A . Table of registered control sets Annex B . Bi-directional text (BDT) model B.1 General B.2 B.3 B.4 B.5 Requirements for handling bi-directional text The bi-directional device model . Control functions for
26、 handling bi-directionality in Telematic services - Bi-directional devices with presentation component only Levels of device support for bi-directionality . Annex C - Text area formats . C.l Dimension of the text area C.2 Line home position . Annex D - Cross reference table . Puge 41 42 42 42 43 45
27、45 46 46 46 47 47 47 47 48 48 49 49 50 50 50 51 51 51 51 51 52 52 52 53 53 53 53 54 54 55 55 61 62 62 62 62 64 iv Recommendation T.53 (04/94) ITU-T RECMNxT.53 94 4862573 0592943 TTT = SUMMARY This Recommendation defines the character coded control functions and their coded represenation for use in 7
28、-bit and 8-bit coded IT-T Telematic services and related to the text communication part of the Telematic services. The control functions contained in this Recommendation define the basic meanings which may be common in some (orall) of the Telematic services. The definitions of the control functions
29、are aligned to those in ISO/IEC 6429 and ISO/IEC 10538 where possible with the exception of some specific functions defined by particular services. This Recommendation specifies control functions to handle bi-directional texts in character-imaging devices. The bi-directional concept is an addition t
30、o the uni-directional device concept which was the base for the former ITU-T Recommendations I IS0 standards. It means that the control functions which were modified to meet the bi-directional requirements can be used for unidirectional devices, as before. Recommendation T.53 (04/94) V ITU-T RECMN*T
31、.53 94 = 4862591 0592944 936 = Recommendation T.53 CHARACTER CODED CONTROL FUNCTIONS FOR TELEMATIC SERVICES (Geneva, 1994) 1 Scope 1.1 General This Recommendation defines the character coded control functions and their coded representation for use in 7-bit and 8-bit codes, in use by IT-T Telematic s
32、ervices. The control functions contained in this Recommendation define the basic meanings which may be common in some (or ail) of the Telematic services. The definitions of the control functions are aligned to those in ISO/IEC 6429 and ISO/IEC 10538 where possible with the exception of some specific
33、 functions defined by particular services for their use. Where the control function definitions differ between those in particular existing Telematic services on the one hand, and those in this Recommendation on the other hand, then the definitions in the particular Telematic services should take pr
34、ecedence. For future development, Telematic services should use the control functions defined in this Recommendation. This Recommendation specifies control functions to handle bi-directional texts in character-imaging devices. The bi-directional concept is an addition to the uni-directional device c
35、oncept which was the base for the former IT-T Recommendations I IS0 Standards. That means that the control functions which were modified to meet the bi-directibnal requirements can be used for uni-directional devices, as before. 1.2 TheITU-T considering (a) services: the increasing interdependence o
36、f the various ITU-T character sets and coding schemes in various Telematic (b) services; the introduction of new facilities such as code conversion and interworking between various Telematic (cl the advantage of having relevant control functions and coding schemes compiled in one Recommendation: (4
37、set; that Recommendation T.50 specifies the International Reference Version (iRV) of the 7-bit coded character (e) sets for Telematic services; that Recommendations T.51 and T.52 define the Latin based, respectively the non-Latin based, coded character o that Recommendation.T.5 1 defines the code ex
38、tension mechanisms used in Telematic services: (g) that Recommendations T.61 and T. 101 define the character coding systems for Teletex and Videotex; (h) environments, that Recommendation T.416 defines the character content architecture in Open Document Architecture (ODA) (i) that Annex Dir.4 define
39、s an optional character mode of group 3 facsimile apparatus, provides the following Recommendation as a reference document, from which control functions should be derived for individual Telematic services. Recommendation T.53 (04) 1 1.3 Telematic services. This Recommendation specifies the character
40、 coded control functions related to the text communication part of 1.4 need for such is identified for one or more Telematic services. This Recommendation is open-ended, additional control functions being subject to further inclusion as the 2 Normative references v The following -T Recommendations a
41、nd International Standards contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recomme
42、ndation are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and IS0 maintain lists of currently valid International Standards. The TSB maintains a list of currently valid ITU-T Recommendations. 2.1 Identi
43、cal Recommendations I International Standards None. 2.2 Paired Recommendations I International Standards equivalent in technical content - CCITT Recommendation T.50 (1992), International Reference Alphabet. ISO/IEC 646: 1991, Information technology - IS0 7-bit coded character set for information tec
44、hnology. - CCITT Recommendation T.51 (1992), Latin based coded character sets for Telematic services. ISO/DIS 6937: 1991, Information technology - Coded graphic character set for the communication of texts using the Latin alphabet. - CCITT Recommendation T.416 (1988) I IS0 8613-6:1988, Open document
45、 architecture (ODA) and interchange format - Character content architecture. 2.3 Additional references - CCITT Recommendation T.4 (1992), Standardization of Group 3 Facsimile Apparatus for Document Transmission, Annex D - Optional Character Mode of Group 3. - ITU-T Recommendation T.52 (1993), Non-La
46、tin coded character sets for Telematic services. - IT-T Recommendation T.61 (1993), Character repertoire and coded character sets for the international Teletex service. - IT-T Recommendation T. 101 (1993), International interworking for Videotex services. - IS0 17451975, Information processing - Bas
47、ic mode control procedures for data communication systems. - IS0 2022:1986, Information processing - IS0 7-bit and 8-bit coded character sets - Code extension techniques (under revision). - IS0 2375: 1985, Data processing - Procedure for registration of escape sequences. ISO/IEC 6429:1992, Informati
48、on processing - Controlfunctions for 7-bit and 8-bit coded character sets. - - ISO/IEC 7350: 1991, Information technology - Registration of repertoires of graphic characters from ISO/IEC 10367. 2 Recommendation T.53 (04/94) ITU-T RECMNxT.53 94 m 48b259l.1 0592946 709 = - ISO/IEC 10367:1991, Informat
49、ion technology - Standardized coded graphic character sets for use in code: A set of unambiguous rules that establishes a character set and the one-to-one 3.21 control character: A control function, the coded representation of which consists of a single bit combination. 3.22 has a coded representation consisting of one or more bit combinations. control function: An action that affects the recording, processing, transmission, or interpretation of data that 3.23 control sequence: A sting of bit combinations starting with that representing the control character C
