1、ITU-T RECMN*T=54L 73 48b2571 0594335 662 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU TELEMATIC SERVICES TERMINAL EQUIPMENTS AND PROTOCOLS FOR TELEMATIC SERVICES T.541 (03/93) OPERATIONAL APPLICATION PROFILE FOR VIDEOTEX INTERWORKING ITU-T Recommendatio
2、n T.541 (Previously “CCITT Recommendation”) FOREWORD The IT Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecom- munication Union. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a
3、 view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, established the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. IT-T Recommendation T
4、.541 was revised by the ITU-T Study Group VI11 (1988-1993) and was approved by the WTSC (Helsinki, March 1-12, 1993). NOTES 1 As a consequence of a reform process within the International Telecommunication Union (ITU), the CCITT ceased to exist as of 28 February 1993. In its place, the ITU Telecommu
5、nication Standardization Sector (ITU-T) was created as of 1 March 1993. Similarly, in this reform process, the CCIR and the IFRB have been replaced by the Radiocommunication Sector. In order not to delay publication of this Recommendation, no change has been made in the text to references containing
6、 the acronyms “CCITT, CCIR or IFRB” or their associated entities such as Plenary Assembly, Secretariat, etc. Future editions of this Recommendation will contain the proper terminology related to the new ITU structure. 2 telecommunication administration and a recognized operating agency. In this Reco
7、mmendation, the expression “Administration” is used for conciseness to indicate both a O IT 1994 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing f
8、rom the ITU. ITU-T . . CONTENTS Scope Field of application References Definitions Characteristics supported by this operational application profile 5.1 Overview 5.2 Range of operational structures 5.3 Generic characteristics 5.4 Specific characteristics . Definition of the operational application pr
9、ofile 6.1 Complexity level of operational structures . 6.2 Operational profile level . 6.3 Specification of operational structures . 6.4 Specification of attributes . 6.5 6.6 Attribute Values for constituents of the Operational Structures . Default values for application defined attributes 6.7 Impli
10、citly created constituents Annex A . Operational structure A.l Constituents of the operational structure A.2 Definitions of attributes Annex B - Collection of operational application profile in ASN.l . B.l Operational data formats . Annex C - Summary of ASN.1 object identifiers Page 1 1 1 2 2 2 2 2
11、2 2 2 3 3 4 10 11 12 12 12 13 16 16 21 Recommendation T.541 (0393) 1 ITU-T RECMN+T-541 93 4862591 0594118 371 0 Recommendation T.541 OPERATIONAL APPLICATION PROFILE FOR VIDEOTEX INTERWORKING (Melbourne, 1988; revised Helsinki, 1993) 1 Scope This Recommendation defines an operational application prof
12、ile which conforms to the T.400-Series Recommendations. Its purpose is to specify an operational structure class suitable for videotex interworking as defined in configuration 1 of Recommendation F.300 and in Recommendation T.564. 2 Field of application This Recommendation defines an operational app
13、lication profile, that is in conformance with DTAM (see the T.400-Series Recommendations) and that allows operational structures to be interchanged for the purpose of an 000000international videotex interworking. This operational application profile defines the features of the operational structure
14、that can be interchanged. These features depend on the document structures as specified in the document application profile (see Recommen I dation T.504). 3 References - Rec. F.300 Videotex service. - - - - Rec. X.224 (1988) Transport protocol specification for open systems interconnection for CCIU
15、Rec. X.200 (1988) Reference model of open systems interconnection for CCIT applications. Rec. X.213 (1992) Information technology - Network service definition for open systems interconnection. Rec. X.214 (1988) Transport service definition for open systems interconnection for CCIV applications. appl
16、ications. - Rec. X.215 (1988) Session service definition for open systems interconnection for CCIITapplications. - Rec. X.225 (1988) Session protocol specification for open systems interconnection for CCIIT applications. - Rec. X.216 (1988) Presentation service definition for open systems interconne
17、ction for CCIU applications. Rec. X.226 (1988) Presentation protocol specification for open systems interconnection for CCITT applications. Rec. X.217 (1992) Service definition for the Association Control Service Element. Rec. X.227 (1 992) Connection-oriented protocol speciFcation for the Associati
18、on Control Service Element, Rec. T. 101 International interworking for videotex services. Rec. T.400 Introduction to document architecture, transfer and manipulation. Rec. T.411 Open document architecture (ODA) and interchange format - Introduction and general principles. Rec. T.412 Open document ar
19、chitecture (ODA) and interchange format - Document structures. Rec. T.414 Open document architecture (ODA) and interchange format - Documentprofile. - - - - - - - - Recommendation T.541 (03/93) 1 ITU-T RECMN*T.541 93 m 4862591 0594339 208 m - Rec. T.415 Open document architecture (ODA) and interchan
20、ge formut - Open document interchange format (ODIF). Rec. T.431 Document transfer and manipulation (DTAM) - Services and protocols - Introduction and general principles. Rec. T.432 Document transfer and manipulation (DTAM) - Services and protocols - Service definition. Rec. T.433 Document transfer a
21、nd manipulation (DTAM) - Services and protocols - Protocol specification. Rec. T.441 Document transfer and manipulation (DTAM) - Services and protocols - Operational structure. - - - - - - - Rec. T.504 Document application profile for videotex interworking. Rec. T.523 Communication application profi
22、le DM-i for videotex interworking. Rec. T.564 Gateway characteristics for videotex interworking. 4 Definitions The definitions of the TAOO-Series Recommendations apply also to this Recommendation. 5 Characteristics supported by this operational application profile 5.1 Overview For the purpose of vid
23、eotex interworking operational structures are associated with a videotex document to provide an environment for interactive communication, necessary for a recipient to handle the users input data as intended by the originator. Therefore the purpose of this clause is to specify the functional descrip
24、tion of the features supported by this operational application profile. 5.2 Range of Operational structures For the purpose of an international videotex interworking four operational structures are specified, one of each representing the “data entry structure”, the “application control memory”, the
25、“administrative structure” and the “special terminal facilities structure” as defined in Recommendation T.564. 5.3 Generic characteristics Not used. 5.4 Specific characteristics Each of the operational structures specified in this operational application profile only supports specific features of op
26、erational structures. 6 Definition of the operational application profile 6.1 For further study. Complexity level of operational structures 2 Recornmendation T.541 (03/93) 6.2 Operational profile levei One operational profile has to be defined for every application using operational structures. This
27、 operational profile specifies: - - Four operational structures are used; Each of the operational structures only contains specific features. Details are for further study. 6.3 Specification of operational structures Four operational structures are specified by this operational application profile.
28、6.3.1 Data entry structure The data entry structure as defined in Recommendation T.564 is mapped onto one specific operational structure. No generic operational structure is present. The DATA-ENTRY-SE is mapped to the specific operational root. The object identifier of the root of this Operational S
29、tructure has an assigned value of 1 1. The subordinates of DATA-ENTRY-SE are: DATA-ENTRY-PROGRAM-SE, FIELD-SE, RULES-SE, PROMPT-SE, and RESULT-SE. DATA-ENTRY-PROGRAM-SE is mapped to composite operational object. FIELD-SE, RULES-SE, PROMPT-SE and RESULT-SE are mapped to basic operational objects. FIE
30、LD-SE, PROMPT-SE and RESULT-SE may have associated operational elements. Subordinate to DATA-ENTRY-PROGRAM-SE is DATA-ENTRY-SUBPROGRAM-SE. DATA-ENTRY- SUBPROGRAM-SE is mapped to basic operational object. For each of the SES specified above, constraints are defined on the number of SES which may exis
31、t at one time. These constraints are defined in Recommendation T.564. 6.3.2 Application Control Memory Structure The Application Control Memory Structure as defined in Recommendation T.564 is mapped onto one specific Operational Structure. No generic Operational Structure is present. The APPLICATION
32、-CONTROL-MEMORY-SE is mapped to the specific operational root. The object identifier of the root of this Operational Structure has an assigned value of 12. Subordinate to the APPLICATION-CONTROL-MEMORY-SE is the RECORD-SE. The RECORD-SE is mapped to basic operational object. For each of the SES spec
33、ified above, constraints are defined on the number of SES which may exist at one time. These constraints are defined in Recommendation T.564. 6.3.3 The Administrative Structure The Administrative Structure as defined in Recommendation T.564 is mapped onto one specific Operational Structure. No gener
34、ic Operational Structure is present. The ADMINISTRATIVE-INFORMATION-SE is mapped to the specific operational root. The object identifier of the root of this Operational Structure has an assigned value of 13. 6.3.4 Special Terminal Facilities Structure The Special Terminai Facilities Structure as def
35、ined in Recommendation T.564 is mapped onto one specific Operational Structure. No generic Operational Structure is present. The SPECIFIC-TERMINAL-FACILITIES-SE is mapped to the specific operational root. The object identifier of the root of this Operational Structure has an assigned value of 14. Su
36、bordinate to the SPECIAL-TERMINAL-FACILITIES-SE is the REDEFINITION-ENTITY-SE. REDEFINITION- ENTITY-SE is mapped to basic operational object. For each of the SES specified above, constraints are defined on the number of SES which may exist at one time. These constraints are defined in Recommendation
37、 T.564. Recommendation T.541 (03/93) 3 ITU-T RECMN*T*541 93 4862591 0594121 966 MM MM - DD - 6.4 Specification of attributes The atributes applicable to constituents of the operational structure are defined in the following tables, using the following notation: - attribute not applicable; M attribut
38、e is mandatory; Nm attribute is non-mandatory; D attribute is defaultable; From the attributes specified for Operational Structures in Annex A, Videotex Interworking will not use the attributes Operational Object Class and Subordinates. The use of the attribute Document Fragment is for further study
39、. 6.4.1 Table 1 shows the use of attributes defined for objects of Operational Structures. Attributes of the Data Entry Structure RESULT-SE Nm TABLE 1f.541 Attributes Object type Object identifier (Note) Reference attribute Application defined attribute lists Default value lists DATA-ENTRY -SE DATA-
40、ENTRY-PROGRAM-SE M M - D Nm M M D D - DATA-ENTRY -SUBPROGRAM-SE FIELD-SE M M D D - 7 M M - D - RULES-SE - M M - D - PROMFT-SE I NOTE -This attribute may be omitted when the value can be ambigously derived from the transmission sequence of the relevant I objects. Values for the attribute object-type:
41、 DATA-ENTRY-SE: O; DATA-ENTRY-PROGRAM-SE: 1; DATA-ENTRY-SUBPROGRAM-SE: 2; FIELD-SE: 3; RULES-SE: 4; PROMPT-SE: 5; RESULT-SE: 6. 4 Recommendation T.541 (03/93) Table 2 shows the use of attributes defined for operational elements. Prompt-content portion Result-content portion MMM DDD DDD TABLE 2fl.541
42、 Data-Entry-Type Operational element identifier (Note) D Operational element content type Operational element content Allowed-characters-for-keyword-access Character4 st-for-keyword-access Field-content portion Nm Nm Max-length-keyword-access Allowed-characters-for-a-direct-access-command NOTE - Thi
43、s attribute may be omitted when the value can be unambiguously derived from the transmission sequence of the relevant elements. D Nm 6.4.1.1 DATA-ENTRY-SE Max-length-direct-access 6.4.1.2 DATA-ENTRY-PROGRAM-SE D The attribute first-subprogram, defined in Recommendation T.564, is mapped to the refere
44、nce attribute, defined in Recommendation T.441 (or currently in Annex A). This application profile specifies the use of this attribute as defaultable. Currently no default value is defined within this standard. The application defined attribute list for the DATA-ENTRY-PROGRAM-SE contains the followi
45、ng attributes. 6.4.1.3 RESULT-SE The attribute Last-subprogram defined in Recommendation T.564 is mapped to the reference attribute defined in Recommendation T.441 (or currently in Annex A). The application defined attribute-list for the RESULT-SE contains the following attribute. I Termination reas
46、on ID1 Recommendation T.541 (03/93) 5 ITU-T RECflN*T-543 93 4862593 0594323 739 Field-layout 6.4.1.4 FIELD-SE The application defined attribute list for the FIELD-SE contains the following attributes: D Field-text-marking Field-type protected Data-source Nm Nm Echo 6.4.1.5 DATA-ENTRY-SUBPROGRAM-SE T
47、he attributes: - reference-to-RULES-SE; - reference-to-FIELD-SE; - reference-to-PROMPT-IN-SE, and reference-to-a-PROMPT-OUT-SE, defined in Recommendation T.564, are mapped to the reference attribute defined in Recommendation T.441 and in Annex A. This application profile specifies the use of these a
48、ttributes as defaultable. Currently no default values are defined within this standard. D The application defined attribute list for the DATA-ENTRY-SUBPROGRAM-SE contains the following attributes. Echo-parameter Nm I Echoed-character IDI Time-out D 6.4.1.6 Rula-SE The application defined attribute l
49、ist for the RULES-SE contains the following attributes: List-of-valid-commands Length-of-choice D D Entry-invoke-character Local-editing List-of-enabled-choices Allow ed-characters Character-list Nm Nm 6 Recommendation T.541 (03/93) ITU-T RECMN*T.541 73 4862573 0574124 675 Position Dimensions 6.4.1.7 PROMPT-SE The application defined attribute list for the Prompt-SE contains the following attributes. D D Coding attributes 6.4.1.8 Prompt content portion The application defined attribute of the content portion is the following. D Attributes Object type Object identifier (N
