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1、INTERNATIONAL STANDARDIZED PROFILE ISO/IEC ISP 11185-2 First edition 1994-l o-01 Information technology - International Standardized Profiles FVT2nn - Virtual Terminal Basic Class - Register of control object type definitions - Part 2: FVTZ13, FVT214 - Sequenced and Unsequenced Terminal Control Obje
2、cts Technologies de linformation - Profils normalis - European Workshop for Open Systems (EWOS); - Open Systems Environment Implementors Workshop (OIW). This International Standardized Profile ISO/IEC ISP 11185 forms an International Register of information objects in accordance with the procedures
3、for the operation of OSI Registration Authorities laid down in ISO/IEC 9834. It is issued in parts, with additional pans being issued as further entries are added to the register. Each pan is prepared in accordance with an approval and maintenance process laid down by the Special Group on Functional
4、 Standardization of ISO/IEC JTCl, information technology. ISO/IEC ISP 11185 is issued under the general title information technology - international Standardized Profiles M2nn - Virtual Terminal Basic Class - Register of control object type definitions. At present the following pans are published or
5、 are in the course of preparation: - Part 1: M211, M212 - Sequenced and Unsequenced Application Control Objects - Part 2: M213, M214 - Sequenced and Unsequenced Terminal Control Objects - Part 3: M215, M216 - Application RIO Record Loading Control Object, Terminal RIO Record Notification Control Obj
6、ect - Part 4: M217 - Horizontal Tabulation Control Object - Part 5: NT218 - Logical Image Control Object - Part 6: M219 - Status Message Control Object - Part 7: M2770 - Entry-Control Control Object - Part 8: M221 - Forms FE/CO (Field Entry Instruction Control Object) No.1 - Part 9: M222 - Paged FE/
7、CO (Field Entry Instruction Control Object) No.1 - Part 10: M231 - Forms FEPCO (Field Entry Pilot Control Object) No.1 - Part 11: M232 - Paged FEPCO (Field Entry Pilot Control Object) No. 1 - Part 12: M2116, M2117, M2118, M2119 - Generalized Telnet Synch, Signal, Negotiation and Subnegotiation Contr
8、ol Objects - Part 13: M2111 - Waiting Time Control Object - Part 14: M2112 - Printer Control Object - Part 15: M2113 - Field Definition Management Control Object - Part 16: M2114 - Terminal Signal Titles Control Object - Part 17: M2115 - Help Text Control Object Annex A of this part of ISO/IEC ISP 1
9、1185 forms an integral part of this International Standardized Profile. iii Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:00:16 MDTNo reproduction or networking permitted wi
10、thout license from IHS -,-,- ISO/IEC ISP 11185-2: 1994(E) 0 ISO/IEC Introduction This International Standardized Profile ISO/IEC ISP 11185 is defined within the context of Functional Standardization, in accordance with the principles specified in ISO/IEC TR 10000, “Framework and Taxonomy of Internat
11、ional Standardized Profiles”. The context of Functional Standardization is one part of the overall field of Information Technology (IT) standardization activities, covering base standards, profiles and registration mechanisms. The Open Systems Interconnection (OSI) Standard IS0 9040 for the Virtual
12、Terminal Basic Class Service identifies a requirement for an International Register of VT Control Object type definitions. Procedures for the operation of this International Register are laid down in ISO/IEC 9834-5. This International Standardized Profile provides this register. The individual entri
13、es in this register constitute Interchange Format and Representation Profiles (F-Profiles) within the framework of ISO/IEC TR 10000. This pan of ISO/IEC ISP 11185 was developed in close cooperation between the three Regional OSI Workshops, namely the OSE Implementors Workshop (OIW) of the United Sta
14、tes, the European Workshop for Open Systems (EWOS) and the OSI Asia- Oceania Workshop (AOW). It was developed under the editorship of EWOS from a control object specification contained in the OIW Stable Implementation Agreements, Version 3 (December 1989). The text is harmonized between these three
15、Workshops and it has been ratified by the plenary assemblies of each Workshop. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:00:16 MDTNo reproduction or networking permitted
16、 without license from IHS -,-,- INTERNATIONAL STANDARDIZED PROFILE So”EC ISO/IEC ISP 11185-2: 1994(E) Information technology - International Standardized Profiles FVT2nn - Virtual Terminal Basic Class - Register of control object type definitions - Part 2: FVT213, FVT214 - Sequenced and Unsequenced
17、Terminal Control Objects 1 Scope 1 .l General The concept of Profiles for OSI, and the structure of the International Standardized Profiles that document them, are defined in ISO/IEC TR 10000-1. Such Profiles are divided into a number of different classes and sub-classes. Two of these classes contai
18、n 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 Profiles (A-Profiles) and the Interchange Format and Representation Profiles (F-Profiles). The relationship between A-Profiles
19、and F-Profiles is described in 7.3.2 of ISO/IEC TR 10000-I and is as follows. 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
20、such information structures. Particular functional requirements may then be met by the combination of an A-Profile with one or more F- Profiles. Establishment of a VT-association involves the selection by negotiation of a particular Virtual Terminal Environment profile (VTE-profile), and of particul
21、ar values for any arguments of that VTE-profile. The VTE-profile specification, and possibly also the values of certain VTE-profile arguments, may in turn reference the definitions of VT control object types and assignment types. These VTE-profiles, control object types and assignment types are thus
22、 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 registered instance constitutes an F-Pro
23、file within the framework of ISO/IEC TR 10000. The Virtual Terminal Basic Class Service and Protocol may be used to realise a wide range of distinct functions. Particular functions may be realised through the selection of appropriate VT functional units, F-Profiles and other VTE- profile argument va
24、lues. The specification of the selection required to realise a particular function and to promote interoperability constitutes a Virtual Terminal A-Profile within the framework of ISOllEC TR 10000. The three International Registers of VT information structures and the specifications of VT Applicatio
25、n Profiles are each published as a separate multi-part ISP as follows: - 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 Register of assignment-type definitions; - ISO/IEC ISP 11187 contains the spe
26、cifications of VT Application Profiles. This pan of ISO/IEC ISP 11185 contains the definitions of two control object types that may be used to convey uninterpreted signals from a terminal to an application. One is used to convey these signals in sequence with other data. The other is used to convey
27、these signals urgently when there is no requirement to maintain a sequence order with other data. 1.2 Position within the taxonomy The taxonomy of International Standardized Profiles for 0% is laid down in ISO/IEC TR 10000-2. Within the classification scheme of this taxonomy, the OSI Profiles specif
28、ied in this International Standardized Profile are in the Virtual Terminal Registered Object sub-class of the class of Interchange Format and Representation Profiles. A Profile within this subclass has a Profile identifier of the form FVTabc, where abc is a structured numerical identifier that ident
29、ifies the position of the Profile within each of the 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 model allows for multiple classes of operation, although at the
30、time of publication of this International Standardized Profile only the Basic Class 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 21:00:16 MDTNo reproduction or networking pe
31、rmitted without license from IHS -,-,- ISO/IEC ISP 11185-2: 1994(E) 0 ISO/IEC has been defined. The value of the identifier component a distinguishes between distinct types of information object as follows: - a = 1 for Basic Class VTE-profiles; - a = 2 for Basic Class Control Objects; - a = 3 for Ba
32、sic Class Assignment Types. Values of a greater than 3 are reserved for future developments. This International Standardized Profile ISO/IEC ISP 11185 contains the specifications of the Profiles with identifiers of the form FVT2bc. For this form of identifier, the component b distinguishes between t
33、he five major classifications of Basic Class Control Objects as follows: - b = 1 for Miscellaneous Control Objects; - b = 2 for Field Entry Instruction Control Objects; - b = 3 for Field Entry Pilot Control Objects; - b = 4 for Reference Information Objects; - b = 5 for Termination Conditions Contro
34、l Objects. Each of these classifications corresponds to a sub-register under the procedures of ISO/IEC 9834-5. The identifier component c is the serial number of the control object type in the appropriate sub-register. Values of b greater than 5 are reserved for new classifications of Basic Class Co
35、ntrol Objects that may be defined in future amendments to IS0 9040. This part of ISO/IEC ISP 11185 contains the definitions of the Miscellaneous Control Object types with the Profile identifiers FVT213 - Sequenced Terminal Control Object; FVT214 - Unsequenced Terminal Control Object. 1.3 Scenario Th
36、e 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 a shared Conceptual Communication Area (CCA) that is a conceptual pan of the VT service-provider. Information exchange is modelled by one VT-user updating the co
37、ntent of the CCA and the changed state of the CCA then being made accessible to the peer VT-user, Control objects (COs) form one of the types of information object that may be present in the CCA. This is illustrated in figure 1, in which CO-l, CO-2, . . . CO-n represent a number of different control
38、 objects present in the CCA. The negotiation during establishment of a VT-association will determine whether or not these will include control objects of either or both of the types whose definitions are given in this part of ISO/IEC ISP 11185. The CCA is structured by the Virtual Terminal Service i
39、nto a number of components. For a control object the Data Structure Definition (DSD) component of the CCA contains the syntax of its information content, including the range of possible values and the permitted update operations. The VT sew provision for such recognition exists only in an S-mode VT-
40、association. Control objects of the types defined in this part of ISO/IEC ISP 11185 are used to enable the terminal end system to issue signals to the application package without the need for the VT service-provider to be aware of the semantic significance placed on these signals by the application
41、package. These signals are issued in response to the operation of an object updating device by the human user of the terminal end system. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 0
42、4/22/2007 21:00:16 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 ISO/IEC Terminal end system I VT-user A Q Devices 1 VT service ptlmitives -J L 4 b VT Protocol VTPM-B Figure 2 - Control objects in the VT Protocol model The Virtual Terminal Protocol specification given i
43、n IS0 9041- 1 models the VT service-provider in terms of protocol exchange between two Virtual Terminal Protocol Machines (VTPMs), each with its own CCA. The CCA of each VTPM is updated both by service primitives received from its own VT- user and by protocol elements received from the peer VTPM. Co
44、rresponding service primitives and protocol elements are issued by the VTPM to provide notification of changes to the content of its CCA. This is illustrated in figure 2 in the context of the asymmetric end systems described above. The control object type definitions given in this part of ISO/IEC IS
45、P 11185 are expressed in terms of this model. For certain types of control object the abstract syntax of IS0 9041-I does not provide a complete specification for the representation of CO update operations. This arises where the abstract syntax of IS0 9041-I makes use of an ASN.1 any type, or where s
46、ymbolic values have to be encoded in terms of an ASN.l integer type. Control object type definitions are required by ISO/IEC 9834-5 to provide the necessary refinement of the abstract syntax. NOTE 2 - Since an abstract syntax is made available for use through its inclusion in a presentation context,
47、 and since the Presentation service-provider has no knowledge of control object type definitions, in principle the VT-users provide the Presentation service-provider with these refinements to the abstract syntax through local management procedures. Whether or not this is necessary in practice depend
48、s on the configuration of the implementations concerned. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this part of ISO/IEC ISP 11185. At the time of publication, the editions indicated were valid. All documents are
49、subject to revision, and parties to agreements based on this International Standardized Profile 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 specific to a particular edition. Members of IEC and IS0 maintain registers of currently valid International Standards and ISPs, and CCITT maint