F Information Systems (normative)

1. This Annex provides a set of facilities relevant to Information Systems programming. These fall into several categories:
   1. an attribute definition clause specifying Machine_Radix for a decimal subtype;
   2. the package Decimal, which declares a set of constants defining the implementation's capacity for decimal types, and a generic procedure for decimal division; and
   3. the child packages Text_IO.Editing and Wide_Text_IO.Editing, which support formatted and localized output of decimal data, based on "picture String" values.

1. See also: See section 3.5.9 Fixed Point Types, See section 3.5.10 Operations of Fixed Point Types, See section 4.6 Type Conversions, See section 13.3 Representation Attributes, See section A.10.9 Input-Output for Real Types, See section B.4 Interfacing with COBOL, See section B.3 Interfacing with C, See section G Numerics (normative).
2. The character and string handling packages in See section A Predefined Language Environment (normative), are also relevant for Information Systems.
   Implementation Advice
   
3. If COBOL (respectively, C) is widely supported in the target environment, implementations supporting the Information Systems Annex should provide the child package Interfaces.COBOL (respectively, Interfaces.C) specified in Annex B and should support a convention_identifier of COBOL (respectively, C) in the interfacing pragmas, See section B Interface to Other Languages (normative), thus allowing Ada programs to interface with programs written in that language.

• F.1: Machine_Radix Attribute Definition Clause
• F.2: The Package Decimal
• F.3: Edited Output for Decimal Types --- The Detailed Node Listing ---
• F.1: Machine_Radix Attribute Definition Clause
• F.2: The Package Decimal
• F.3: Edited Output for Decimal Types
• F.3.1: Picture String Formation
• F.3.2: Edited Output Generation
• F.3.3: The Package Text_IO.Editing
• F.3.4: The Package Wide_Text_IO.Editing

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