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1、INTERNATIONAL STANDARDIZED PROFILE ISO/IEC ISP 11185-7 First edition 1994-l o-01 Information technology - International Standardized Profiles FVTZnn - Virtual Terminal Basic Class - Register of control object type definitions - Part 7: FVTZIIO - Entry-Control Control Object Technologies de /informat
2、ion - 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 for the operation of OSI Regi
3、stration Authorities laid down in ISO/IEC 9834. It is issued in pans, with additional parts being issued as further entries are added to the register. Each part is prepared in accordance with an approval and maintenance process laid down by the Special Group on Functional Standardization of ISO/IEC
4、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 parts are published or are in the course of prepa
5、ration: - 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 Object - Part 4: M217 - Horizon
6、tal Tabulation Control Object - Part 5: M218 - Logical Image Control Object - Pan 6: M219 - Status Message Control Object - Part 7: M2110 - Entry-Control Control Object - Part 8: NT221 - Forms FE/CO (Field Entry Instruction Control Object) No.1 - Part 9: M222 - Paged FE/CO (Field Entry Instruction C
7、ontrol 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, NT2119 - Generalized Telnet Synch, Signal, Negotiation and Subnegotiation Control Objects - Part 13: M2111
8、- 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 11185 forms an integral part
9、of this International Standardized Profile. iii Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:05:30 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC
10、 ISP 11185-7: 1994(E) 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 International Standardized Profiles”. The context of F
11、unctional 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 Terminal Basic Class Service identifies a requ
12、irement 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 entries in this register constitute Interchange For
13、mat and Representation Profiles (F-Profiles) within the framework of ISO/IEC TR 10000. This part of ISO/IEC ISP 11185 was developed in close cooperation between the three Regional 0% Workshops, namely the OSE Implementors Workshop (OIW) of the United States, the European Workshop for Open Systems (E
14、WOS) and the OSI Asia- Oceania Workshop (AOW). It was developed under the editorship of EWOS from a control object specification contained in the European S-mode Forms Functional Standard of ENV 41 208. The text is harmonized between these three Workshops and it has been ratified by the plenary asse
15、mblies of each Workshop. 0 ISO/IEC iv Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:05:30 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STA
16、NDARDIZED PROFILE ISoIEC ISO/IEC ISP 11185-7: 1994(E) Information technology - International Standardized Profiles FVT2nn - Virtual Terminal Basic Class - Register of control object type definitions - Part 7: FVT2110 - Entry-Control Control Object 1 Scope 1 .l General The concept of Profiles for OSI
17、, and the 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 Servic
18、e 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 and F-Profiles is described in 7.3.2 of ISO/IEC TR 10000-l and is as follows.
19、 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 m
20、et 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 particular values for any arguments of that VTE-profile. The VTE-profile specificatio
21、n, 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 information structures that require explicit reference within the VT protoco
22、l. 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. The Virtual Terminal Basic Cla
23、ss 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 values. The specification of the selection required to realise a particular fun
24、ction and to promote interoperability constitutes a Virtual Terminal A-Profile within the framework of ISO/IEC TR 10000. The three International Registers of VT information structures and the specifications of VT Application Profiles are each published as a separate multi-part ISP as follows: - ISO/
25、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 specifications of VT Application Profiles. This part of ISO/IEC ISP 11185 contai
26、ns the definition of a control object type that is intended for use in conjunction with the Fields VT functional unit. It enables a VT-user to specify field entry controls that are to be applied to every field of a display object, without the need to enter them separately into the Field Definition R
27、ecord of each field. 1.2 Position within the taxonomy The taxonomy of International Standardized Profiles for OSI is laid down in ISO/IEC TR 10000-2. Within the classification scheme of this taxonomy, the OSI Profiles specified in this International Standardized Profile are in the Virtual Terminal R
28、egistered 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 identifies the position of the Profile within each of the three levels of subdivi
29、sion 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 time of publication of this International Standardized Profile only the Basi
30、c Class 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; 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr
31、/9960866100 Not for Resale, 04/24/2007 10:05:30 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC ISP 11185-7: 1994(E) 0 ISO/IEC - a = 2 for Basic Class Control Objects; - a = 3 for Basic Class Assignment Types. Values of a greater than 3 are reserved for future devel
32、opments. 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 the five major classifications of Basic Class Control Objects as follows: - b = 1 for
33、 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 Control Objects. Each of these classifications corresponds to a sub-register under the pro
34、cedures 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 Control Objects that may be defined in future amendments to IS0 9040. This part of ISO
35、/IEC ISP 11185 contains the definition of the Miscellaneous Control Object type with the Profile identifier FVT2110 - Entry-Control Control Object. 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 o
36、f 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 content of the CCA and the changed state of the CCA then being made accessible to the peer VT-user. of the type whose specification is give
37、n in this pan of ISO/IEC ISP 11185. The CCA is structured by the Virtual Terminal Service into 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 permitte
38、d update operations. The current value of its information content is contained in the Control, Signal and Status store (CSS) component. Updates to the current value take place through the issue of VT service primitives by one VT-user to the service-provider. Changes of state of the CCA are made acce
39、ssible through the issue of VT service primitives by the service-provider to the peer VT-user. By clause 14 of IS0 9040, COs enable VT-users to handle control information related to virtual terminal functions and to real devices. This control is exercised by the VT-users through semantics associated
40、 with the information content and with the update operations of the CO. Definition of the semantics, or specification of the source of the semantics if the semantic details are not fully prescribed, forms part of the registered definition of the CO. These semantics are not however of concern to the
41、VT service-provider itself. The DSD will contain an ASN.l object identifier that identifies the registered definition, but the VT service-provider merely acts as a repository of this value. It is only the VT-user that requires knowledge of the registered definition. NOTE 1 - The VTE-parameter values
42、 that determine the syntax of the information content may not be negotiated explicitly during association establishment. Moreover, in the case of non-parametric COs these values do not determine the details of the syntax. Such values and details form part of the registered definition of the CO. Sinc
43、e the VT service-provider is not required to have knowledge of this registered definition, in principle the VT-users provide the VT service-provider with such information through local management procedures, Whether or not this is necessary in practice depends on the configuration of the implementat
44、ions concerned. VT service-provider Conceptual Communlcatlon Area Figure 1 - Control objects in the VT Service model 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 diff
45、erent control objects present in the CCA. The negotiation during establishment of a VT-association will determine whether or not these will include a control object Figure 2 - Control objects in the VT Protocol model The Virtual Terminal Protocol specification given in IS0 9041-l models the VT servi
46、ce-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. Corresponding service primitives an
47、d protocol elements are issued by the VTPM to provide notification of changes to the content of its CCA. This is illustrated in figure 2. The control object type definition given in this part of ISO/IEC ISP 11185 is expressed in terms of this model. For certain types of control object the abstract s
48、yntax of IS0 9041-I does not provide a complete specification for the 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Defense Supply Ctr/9960866100 Not for Resale, 04/24/2007 10:05:30 MDTNo reproduction or networking permitted without licens
49、e from IHS -,-,- 0 ISO/IEC ISO/IEC ISP 111857: 1994(E) representation of CO update operations. This arises where the abstract syntax of IS0 9041-l makes use of an ASN.1 any type, or where symbolic 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 thr