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1、INTERNATIONAL STANDARDIZED PROFILE ISO/IEC ISP 11184-2 First edition 1996-06-01 Information technology - International Standardized Profiles FVTI nn - Virtual Terminal Basic Class - Register of VTE- profiles - Part 2: FVTI 15 - A-mode Generalized Telnet VTE- profile Technologies de /information - Pr
2、ofils normalis - European Workshop for Open Systems (EWOS); - Open Systems Environment Implementors Workshop (OIW). ISO/IEC ISP 11184 consists of the following parts, under the general title Information technology - International Standardized Profiles FVTlnn - Virtual Terminal Basic Class -Register
3、of VTE-profiles: - Part I: FVTl21, FVT122 -S-mode Forms and Paged VTE-profiles - Part 2: FVTllS - A-mode Generalized Telnet VTE-profile - Part 3: FVi714 - A-mode Transparent VTE-profile Annex A forms an integral part of this part of ISOAEC ISP 11184. Annex B is for information only. iv Copyright Int
4、ernational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 21:27:07 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 ISO/IEC ISOiIEC ISP 11184-2: 1996(E) Introduction ISO/IEC
5、ISP 11184 is defined within the context of Functional Standardization, in accordance with the principles specified in ISO/IEC TR 10000, “Framework and Taxonomy of International Standardized Profiles”. The context of Functional Standardization is one part of the overall field of Information Technolog
6、y (IT) standardization activities, covering base standards, profiles and registration mechanisms. The Open Systems Interconnection (OSI) Standard IS0 9040 for the Virtual Terminal Basic Class Service identifies a requirement for an International Register of VT Control Object type definitions. Proced
7、ures for the operation of this International Register are laid down in ISO/IEC 9834-5. ISO/IEC ISP 11184 provides this register. The individual entries in this register constitute Interchange Format and Representation Profiles (F-Profiles) within the framework of ISO/IEC TR 10000. This part of ISO/I
8、EC ISP 11184 was developed in close cooperation between the three Regional OS1 Workshops, namely the OSE Implementors Workshop (OIW) of the United States, the European Workshop for Open Systems (EWOS) and the OS1 Asia-Oceania Workshop (AOW). It was developed under the editorship of OIW from a contro
9、l object specification contained in the OIW Stable Implementation Agreements, Version 5 (December 1991). The text is harmonized between these three Workshops and it has been ratified by the plenary assemblies of each Workshop. This part of ISO/IEC ISP 11184 is derived from the Telnet-1988 profile co
10、ntained in the OIW Stable Implementation Agreements for Open Systems Interconnection Protocols. The control objects, NA and NI, have been changed to model the DO/DONT WILL/WONT negotiation of TELNET options. The size of the elements of the NA and NI negotiation control objects equals the range of TE
11、LNET option numbers, including the numbers presently assigned and those reserved for future options. The CO- category of the KB and DI control objects have been changed from “boolean” to “symbolic”. A “Go- Ahead” shall be signaled by a control object with symbolic value of GA; therefore, the GA cont
12、rol object has been dropped. V Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 21:27:07 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL ST
13、ANDARDIZED PROFILE 0 lSO/lEC ISOAEC ISP 11184-2: 1996(E) Information technology - International Standardized Profiles FVTlnn - Virtual Terminal Basic Class - Register of VTE-profiles - Part 2: FVT115 - A-mode Generalized Telnet VTE-profile 1 Scope 1.1 General The concept of Profiles for OSI, and the
14、 structure of the International Standardized Profiles that document them, are defined in ISO/IEC TR 10000-l. Such Profiles are divided into a number of different classes and sub-classes. Two of these classes contain sub-classes comprising functions of the Virtual Terminal Basic Class Service and Pro
15、tocol specified in the base standards IS0 9040 and IS0 904 1. These are the Application Profiles (A-Profiles) and the Interchange Format and Representation Profiles (F-Profiles). The relationship between A-Profiles and F- Profiles is described in 7.3.2 of ISO/IEC TR 10000-l: 1995 and is as follows.
16、Application Layer base standards require, implicitly or explicitly, the structure of information carried or referenced by them to be specified for each instance of communication. It is the purpose of F-Profiles to specify such information structures. Particular functional requirements may then be me
17、t by the combination of an A-Profile with one or more F-Profiles. The Virtual Terminal Basic Class Service and Protocol applies to applications requiring interactive cormmmication with terminal systems through the transmission and manipulation of graphical images composed of character-box graphic el
18、ements. Through the selection by negotiation of various options, it may be used to realise a wide range of distinct functions. This process of negotiation involves the selection of a set of VT functional units together with a particular Virtual Terminal Environment profile (VTE-profile) and particul
19、ar values for any arguments of that VTE-profile. The specification of a VTE-profile and the permitted values for its arguments may themselves reference other types of object defined in accordance with IS0 9040. These are VT control object types and assignment types. The VTE-profiles, control object
20、types and assignment types are thus information structures that require explicit reference within the VT protocol. Particular instances of these structures are fully defined within the base standards, but the base standards also provide for further instances to be defined by registration. Each regis
21、tered instance constitutes an F-Profile within the framework of ISO/IEC TR 10000. The specification of the selection of options required to realise a particular function and to promote interoperability constitutes a Virtual Terminal A- Profile within the framework of ISOiIEC TR 10000. The three Inte
22、rnational Registers of VT information structures and the specifications of VT Application Profiles are each published as a separate multi-part ISP as follows: 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545
23、001 Not for Resale, 04/18/2007 21:27:07 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC ISP 11184-2: 1996(E) - - - - ISO/IEC ISP 11184 is the Register of VTE- profiles; ISO/IEC ISP 11185 is the Register of control object type definitions; ISO/IEC ISP 11186 is the Re
24、gister of assignment-type definitions; ISO/IEC ISP 11187 contains the specifications of VT Application Profiles. This part of ISO/IEC 11184 contains the definitions of the A-mode Generalized Telnet Profile that may be used to fully emulate the IPS TELNET service. 1.2 Position within the taxonomy The
25、 taxonomy of International Standardized Profile for OS1 is laid down in ISO/IEC TR 10000-2. Within the classification scheme of this taxonomy, the OS1 Profiles specified in this International Standardized Profile are in the Virtual Terminal Registered Object sub-class of the class of Interchange For
26、mat and Representation Profiles requiring cormection- mode Transport Services. A Profile within this subclass has a Profile identifier of the form FVTabc, where abc is a structured numerical identifier that identifies the position of the Profile within each of three levels of subdivision of the subc
27、lass. The values of a and b are single digits but c is an integer that is not necessarily a single digit. In principle the IS0 Virtual Terminal model allows for multiple classes of operation, although at the time of publication of the International Standardized Profile only the Basic Class has been
28、defined. The value of the identifier component a distinguishes between distinct type of information object as follows: - a = 1 for Basic Class VTE-profiles; - a = 2 for Basic Class Control Objects; - a = 3 for Basic Class Assignment Types. Values of a greater than 3 are reserved for future developme
29、nts. This International Standardized Profile ISO/IEC ISP 11184 contains the specifications of the Profiles with identifiers of the form FVTlbc. For this form of identifier, the component b 0 ISOAEC distinguishes between the two modes of operation of the Virtual Terminal Service as follows: - b = 1 f
30、or A-mode (asynchronous mode) operation; - b = 2 for S-mode (synchronous mode) operation. Values of b greater than 2 are reserved for new modes of operation that may be defined in future amendments to IS0 9040. The identifier component c distinguishes between different VTE-profiles with the same mod
31、e of operation. The procedures of ISO/IEC 9834-4 require a single register of VTE-profiles to be maintained without regard to their mode of operation. The value of the component c is therefore not directly related to the serial number of the VIE-profile in the register. This part of ISO/IEC 11184 co
32、ntains the definition of the A-mode Generalized Telnet VIE-profile with the Profile identifier FVT115 for A-mode Generalized Tehret VIE-profile. 1.3 Scenario The specification of the Virtual Terminal Service is given in IS0 9040. It is based on a model in which two VT- users communicate by means of
33、a shared Conceptual Communication Area (CCA) that is a conceptual part of the VT service- provider. Information exchange is modelled by one VT-user updating the content of the CCA and the changed state of the CCA then being made accessible to the peer VT-user. The Virtual Terminal Service has a basi
34、c capability that may be enhanced by the addition of one or more optional functional units . The CCA is structured by the Virtual Terminal Service into a number of components. There is a Conceptual Data Store (CDS) that contains one or two display objects (DOS), a Control, Signal and Status store (C
35、SS) that contains zero, one or more control objects (COs) and in addition there may be one or more device objects. Display objects and control objects have an information content that is modified during the data handling phase of the VT Service. Device objects model certain logical characteristics o
36、f real devices. They may also provide linkages between different objects of the CCA and between such objects and real devices. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 2
37、1:27:07 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 ISOiIEC There are two modes of operation of the VT Service. In synchronous mode (S-mode) there is a single display object that is up b. service-provider. 3.1.2 ISO/IEC 9834- 1: 1993, Znformation technology - Open Sys
38、tems Znterconnection - Procedures for the operation of OSZ Registration Authorities - General procedures. This part of ISO/IEC ISP 11184 makes use of the following terms defined in ISO/IEC 8822: a. abstract syntax; b. presentation context. ISO/IEC 9834-4: 199 1, Information technology - Open Systems
39、 Interconnection - Procedures for the operation of OSZ Registration Authonties - Part 4: Register of VTE Profile. 3.13 his part of ISO/IEC ISP 11184 makes use of the following terms defined in ISO/IEC 8824: ISO/IEC 9834-5 : 199 1, Information technology - General principles and en Systems Interconne
40、ction - Procedures for documentation flamework. the operation of OSZ Registration Authorities - Part 5: Register of VT Control Object Definitions. ISOiIEC TR 10000-1:1995, Information technology - Framework and taxonomy of International Standardized Projiles - Part 1: a. my type; b. null type; a. re
41、gistration; C. object descriptor type; d. object identifier. 3.1.4 This part of ISO/IEC ISP 11184 makes use of the following terms defined in ISO/IEC 9834-l: ISO/IEC TR loooo-2: 1995, Information technology - Framework and taxonomy of International Standardized Profiles - Part 2: Principles and Taxo
42、nomy for OSZ profiles. ISO/IEC 1073 1: 1994, Znformation technology - Open Systems Interconnection - Basic Reference Model - Conventions for the definition of OSZ b. registration-hierarchical-name. 3.2 Terminology of VT base standards 3.2.1 This part of ISOlIEC ISP 11184 makes use of the following t
43、erms defmed in IS0 9040: a. A-mode; 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 21:27:07 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 ISOiIEC
44、 b. C. d. e. f. g* h. 1. j. k. 1. m. n. 0. 3.2.2 array element; character-repertoire; control object; device object; object updating device; primary attribute; rendition attribute; secondary-attribute; VT-association; VT-environment (VTE); VT-user; VTE-parameter; VTE-profile; VTE-profile argument. T
45、his part of ISO/IEC ISP 11184 makes use of the following terms defined in IS0 9041-l: a. protocol-element. 4 Abbreviations For the purposes of this part of ISO/IEC ISP 11184, the following abbreviations apply. AOW DM EC EL EWOS GA IAC IPS MIL-STD NVT OIW OSE RFC SB SE TELNET All other OS1 Asia-Ocean
46、ic Workshop; TELNET Data Mark TELNET Erase Character TELNET Erase Line European Workshop for Open Systems; TELNET Go Ahead TELNET Interpret As Command Internet Protocol Suite Military Standard ( U.S. ) TELNET Network Virtual Terminal OSE Implementors Workshop; Open Systems Environment. Request For C
47、omments TELNET Subnegotiation Begin TELNET Subnegotiation Parameters End Telecommunications Network abbreviations used are defined in ISOAEC TR 10000 or IS0 9040. ISO/IEC ISP 11184-2: 1996(E) 5 Principles of Conformance to VT Profiles An implementation of the Virtual Terminal Protocol conforms to an
48、 FVTM Profile that specifies a VTE- profile if the protocol implementation is capable of sending and receiving PDUs for the establishment of a full- VTE in which the VTE-profile name is that specified in the FVTlnn Profile. If the VTE- profile specification includes the definition of any control obj
49、ect types in accordance with clause 14 of IS0 9040 then there is a further conformance requirement. In this case conformance to the VTE-profile requires in addition that the protocol implementation is capable of sending and receiving PDUs corresponding to all update operations permitted for that CO type whenever a CO of that type is present in the VTE. Conformance of a