Information technology - International Standardized Profiles FVT2nn - Virtual Terminal Basic Class - Register of control object type definitions - Part 13: FVT2111 - Wainting Time Control Object
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/IEC TR 10000-1.
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 ISo
9040 and ISO 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 or
ISO/IEC TR 10000-1 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 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
aparticular 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
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-Profile
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 values. 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 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/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 contains the definition of a control object type
that may be used to set a time limit associated with data entry into the disply
object during S-mode operation of a VT-association. The significance of the
expiry of this time limit does not form part of this definition and should be
specified by any VTE-profile that references a control object of this type. 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 Registered Object sub-class of the class of International
Format and Representation Profiles. A Profile within this subclass has a Profile identifier of the form FVTabc,
where abc is a strutured numerical identifier that identifies 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 ISO Virtual Terminal model allows for multiple classes of
operation, although at the time of publication of this International
Standardized Profile only the Basic Class has been defined. The value of the
id