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1、INTERNATIONAL STANDARDIZED PROFILE ISO/IEC ISP 11184-3 First edition 1996-06-01 Information technology - International Standardized Profiles FVTI nn - Virtual Terminal Basic Class - Register of VTE- profiles - Part 3: FVTI 14 - A-mode Transparent VTE-profile Technologies de Iinformation - Profils no
2、rmalis - 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 of VTE-
3、profiles: - Part 1: FVTl21, FVT122 - S-mode Forms and Paged VTE-profiles - Part 2: FVTlI.5 - A-mode Generalized Telnet VTE-profile - Part 3: FVTll4 - A-mode Transparent VTE-profile Annex A forms an integral part of this part of ISO/IEC ISP 11184. . . . 111 Copyright International Organization for St
4、andardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:57:22 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARDIZED PROFILE B l!WlEC 1somc ISP 11184-3: 1996(E) Information technol
5、ogy - International Standardized Profiles FVTlnn - Virtual Terminal Basic Class - Register of VTE-profiles - Part 3: FVTl14 - A-mode Transparent 1 Scope 1.1 General The concept of Profiles for OSI, and the structure of the International Standardized Profiles that document them, are defined in ISO/IE
6、C TR IOOOO- 1. 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 Protocol specified in the base standards IS0 9040 and IS0 9041. These are the Application Profile
7、s (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 ISOAEC TR lOOOO- 1: 1995 and is as follows. Application Layer base standards require, implicitly or explicitly, the structure of informatio
8、n 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 met by the combination of an A-Profile with one or more F-Profiles. The Virtual Terminal Basic Cl
9、ass Service and Protocol applies to applications requiring interactive communication with terminal systems VTE-profile through the transmission and manipulation of graphical images composed of character-box graphic elements. Through the selection by negotiation of various options, it may be used to
10、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 particular values for any arguments of that VTE-profile. The specification of a VTE-profile
11、 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 types and assignment types are thus information structures that require explicit re
12、ference 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 registered instance constitutes an F-Profile within the framework of ISO/IEC TR 10000. T
13、he 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 ISO/IEC TR 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licens
14、ee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:57:22 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC ISP 111843: 1996(E) 0 ISO/IEC 10000. - a = 1 for Basic Class VTE-profiles; The three International Registers of VT - a = 2 for Basic Class Co
15、ntrol Objects; information structures and the specifications of VT Application Profiles are each published as a separate multi-part ISP as follows: - a = 3 for Basic Class Assignment Types. VdUeS of a greater than 3 are reserved for future - ISO/IEC ISP 11184 is the Register of VTE- developments. pr
16、ofiles; - ISO/IEC ISP 11185 is the Register of control object type definitions; - ISO/IEC ISP 11186 is the Register of assignment-type definitions; - ISO/IEC ISP 11187 contains the specifications of VT Application Profiles. ISP 11184 contains the specifications of the This International Standardized
17、 Profile ISO/IEC Profiles with identifiers of the form FVTlbc. For this form of identifier, the component b distinguishes between the two modes of operation of the Virtual Terminal Service as follows: - b = 1 for A-mode (asynchronous mode) operation; This part of ISO/IEC 11184 contains the definitio
18、ns of the A-mode Transparent Profile that may be used to provide a transparent mode of operation which allows VT-users to exchange transparently uninterpreted sequences of characters with the added benefit of delivery control to enable the VT-users to determine when the character sequences are to be
19、 delivered. 1.2 Position within the taxonomy - 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
20、 mode 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 VTE-profile in the register. The taxonomy of Internati
21、onal 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 Format and Representation
22、 Profiles requiring connection- mode Transport Services. This part of ISO/IEC 11184 contains the definition of the A-mode Transparent VTE-profile with the Profile identifier: FVTl14 for A-mode Transparent VTE-profile. 1.3 Scenario A Profile within this subclass has a Profile identifier of the form F
23、VTabc, where abc is a structured numerical identifier that identifies the position of the Profile within each of three levels of subdivision of the subclass. 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 mode
24、l allows for multiple classes of operation, although at the time of publication of the International Standardized Profile only the Basic Class has been defined. The value of the identifier component a distinguishes between distinct type of information object as follows: The specification of the Virt
25、ual Terminal Service is given in IS0 9040. It is based on a model in which two VT- users communicate by means of 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
26、 changed state of the CCA then being made accessible to the peer VT-user. The Virtual Terminal Service has a basic 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 Co
27、nceptual Data Store (CDS) that contains one 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:57:22 MDTNo reproduction or networking permitted without license from IHS -,-,- 0
28、 ISO/IEC or two display objects (DOS), a Control, Signal and Status store (CSS) 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 modifled during the data handling pha
29、se of the VT Service. Device objects model certain logical characteristics of real devices. They may also provide linkages between different objects of the CCA and between such objects and real devices. There are two modes of operation of the VT Service. In synchronous mode (S-mode) there is a singl
30、e display object that is updated alternately by the two VT-users while in asynchronous mode (A-mode) there are two display objects, each VT-user having permanent update access to one of them. The mode of operation, the functional units selected and the set of objects present in the CCA at any time c
31、onstitutes a Virtual Terminal Environment (VTE). The specification of the VTE, including the type definitions of the objects present, is held in the Data Structure Definition (DSD) component of the CCA. Ownership of the Write Access Variable (WAVAR) that is used during S-mode operation is held in th
32、e Access Control Store (ACS). These complete the set of components of the CCA. A VTE is specified parametrically by a complete and consistent set of values for VTE-parameters detined in IS0 9040. The number of these VTE-parameters is large, so their values are themselves specified in a particular in
33、stance by a choice of VTE-profile together with values for any arguments of that VTE-profile. The type definitions of certain control objects may also specify that particular aspects of the CO, such as the initial value of its information content, are to be provided by any VTE-profile that reference
34、s the CO concerned. The VTE in use at any time is determined by negotiation between the two VT-users before entry into the data handling phase. This negotiation takes place by the exchange of VT service primitives that are available exclusively for this purpose, as is illustrated in figure 1. The ne
35、gotiation shall determine whether or not the VTE is established in accordance with the VTE- profile defined in this part of ISO/IEC ISP 11184. ISO/IEC ISP 11184-3: 1996(E) It is possible for the VTE to be changed during the lifetime of a VT- association but only by exit from and subsequent return to
36、 the data handling phase. r VT-user A VTE-profile negotiation VT-user B Ia d L bl VT service-provider Conceptual Communications Area Figure 1 - Negotiation of a VTE through use of a VTE-profile This part of ISO/IEC 11184 defines the A-mode Transparent VTE-profile. It provides for functionality that
37、may be used to provide a transparent mode of operation. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this part of ISO/IEC ISP 11184. At the time of publication, the editions indicated were valid. All documents are s
38、ubject to revision, and parties to agreements based on this part of ISO/IEC ISP 11184 are warned against automatically applying any more recent editions of the documents listed below, since the nature of references made by ISPs to such documents is that they may be specitic to a particular edition.
39、Members of IEC and IS0 maintain registers of currently valid International Standards and ISPs, and KU-T maintains published editions of its current Recommendations. IS0 2375:1985”, Data processing - Procedure for registration of escape sequences. 1) The registration authority for IS0 2375 is the Eur
40、opean Computer Manufacturers Association (ECMA), I I4 rue du Rhone, CH-I204 Geneva, Switzerland, from whom the corresponding register, the IS0 International Register oJ Coded Character Sets to be used with Escape Sequences, may be obtained. Copyright International Organization for Standardization Pr
41、ovided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:57:22 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC ISP 111843: 1996(E) 0 1s0/IEc ISO/IEC 7498- 1: 1994, Information technology - Open Systems Interco
42、nnection - Basic Reference Model: The Basic Model. ISOIIEC 8822: 1994, Information technology - Open Systems Interconnection - Presentation Service Definition. ISO/IEC 1073 1: 1994, Information technology - Open Systems Znterconnection - Basic Reference Model - Conventions for the deJinition of OSZ
43、services. 3 Definitions ISO/IEC 8824: 1990, Information technology - Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN.1). IS0 9040: 1990, Information technology - Open Systems Interconnection - Virtual Terminal Basic Class Service. IS0 9041- 1: 1990, Information tech
44、nology - Open Systems Interconnection - Virtual Terminal Basic Class Protocol - Part I: Spectjication. ISO/IEC 904 l-2: 1993, Information technology - Open Systems Interconnection - Virtual Terminal Basic Class Protocol - Part 2: Protocol Implementation Conformance Statement (PZCS) Profonna. ISOIIEC
45、 9646- 1: 1994, Information technology - Open Systems Znterconnection - Conformance testing methodology and framework - Part 1: General concepts. ISO/IEC 9834- 1: 1993, Information technology - Open Systems Interconnection - Procedures for the operation of OSZ Registration Authorities - General proc
46、edures. ISO/IEC 9834-4: 1991, Information technology - Open Systems Interconnection - Procedures for the operation of OSZ Registration Authorities - Part 4: Register of VTE Profiles. ISOAEC 9834-51991, Information technology - Open Systems Interconnection - Procedures for the operation of OSZ Regist
47、ration Authonties - Part 5: Register of VT Control Object For the purposes of this part of ISO/IEC ISP 11184, the following definitions apply. 3.1 General OS1 terminology 3.1.1 This part of ISO/IEC ISP 11184 makes use of the following terms defined in ISO/IEC 1073 1: a. service primitive; b. service
48、-provider. 3.1.2 This part of ISO/IEC ISP 11184 makes use of the following terms defined in ISO/IEC 8822: a. abstract syntax; b. presentation context. 3.1.3 This part of ISO/IEC ISP 11184 makes use of the following terms defined in ISO/IEC 8824: a. my type; b. null type; C. object descriptor type; d
49、. object identifier. 3.1.4 This part of ISO/IEC ISP 11184 makes use of the following terms defined in ISO/IEC 9834- 1: a. registration; Definitions. ISOLIEC TR 10000-1:1995, Information technology - Framework and taxonomy of International Standardized Projiles - Part I: General principles and documentation framework. ISO/IEC TR lOOOO-2:1995, Information technology - Framework and taxonomy of International Standardize