NF EN 21539 : 1994

Foreword
1. Overview
1.1 Scope
1.2 Processor
1.3 Inclusions and exclusions
1.4 Conformance
1.5 Notation used in this International Standard
1.6 Deleted and obsolescent features
1.7 Modules
1.8 Normative references
2. Fortran terms and concepts
2.1 High level syntax
2.2 Program unit concepts
2.3 Execution concepts
2.4 Data concepts
2.5 Fundamental terms
3.1 Processor character set
3.2 Low-level syntax
3.3 Source form
3.4 Including source text
4. Intrinsic and derived data types
4.1 The concept of data type
4.2 Relationship of types and values to objects
4.3 Intrinsic data types
4.4 Derived types
4.5 Construction of array values
5. Data object declarations and specifications
5.1 Type declaration statements
5.2 Attribute specification statements
5.3 IMPLICIT statement
5.4 NAMELIST statement
5.5 Storage association of data objects
6. Use of data objects
6.1 Scalars
6.2 Arrays
6.3 Dynamic association
7. Expressions and assignment
7.1 Expressions
7.2 Interpretation of intrinsic operations
7.3 Interpretation of defined operations
7.4 Precedence of operators
7.5 Assignment
8. Execution control
8.1 Executable constructs containing blocks
8.2 Branching
8.3 CONTINUE statement
8.4 STOP statement
8.5 PAUSE statement
9. Input/output statement
9.1 Records
9.2 Files
9.3 File connection
9.4 Data transfer statements
9.5 File positioning statements
9.6 File inquiry
9.7 Restrictions on function references and list items
9.8 Restriction on input/output statements
10. Input/output editing
10.1 Explicit format specification methods
10.2 Form of a format item list
10.3 Interaction between input/output list and format
10.4 Positioning by format control
10.5 Data edit descriptors
10.6 Control edit descriptors
10.7 Character string edit descriptors
10.8 List-directed formatting
10.9 Namelist formatting
11. Program units
11.1 Main program
11.2 External subprograms
11.3 Modules
11.4 Block data program units
12. Procedures
12.1 Procedure classification
12.2 Characteristics of procedures
12.3 Procedure interface
12.4 Procedure reference
12.5 Procedure definition
13. Intrinsic procedures
13.1 Intrinsic functions
13.2 Elemental intrinsic procedures
13.3 Positional arguments or argument keywords
13.4 Argument presence inquiry function
13.5 Numeric, mathematical, character, kind, logical,
      and bit procedures
13.6 Transfer function
13.7 Numeric manipulation and inquiry functions
13.8 Array intrinsic functions
13.9 Intrinsic subroutines
13.10 Generic intrinsic functions
13.11 Intrinsic subroutines
13.12 Specific names for intrinsic functions
13.13 Specifications of the intrinsic procedures
14. Scope, association, and definition
14.1 Scope of names
14.2 Scope of labels
14.3 Scope of external input/output units
14.4 Scope of operators
14.5 Scope of the assignment symbol
14.6 Association
14.7 Definition and undefinition of variables
14.8 Allocation status
ANNEXES
A. Glossary of technical terms
B. Decremental features
C. Section notes
D. Syntax rules
E. Permuted index for headings
F. Index
Figures
2.1 Requirements on statement ordering
Tables
2.1 Statements allowed in scoping units
3.1 Special characters
6.1 Subscript order value
7.1 Type of operands and result for the intrinsic
      operation [x1] op x2
7.2 Interpretation of the numeric intrinsic operators
7.3 Interpretation of the character intrinsic operator //
7.4 Interpretation of the relational intrinsic operators
7.5 Interpretation of the logical intrinsic operators
7.6 The values of operations involving logical
      intrinsic operators
7.7 Categories of operations and relative precedences
7.8 Type conformance for the intrinsic assignment
      statement variable = expr
7.9 Numeric conversion and assignment statement
      variable = expr
C.1 Values assigned to INQUIRE specifier variables

Specifies the form and establishes the interpretation of programs expressed in the Fortran language. Promotes reliability, portability, maintainability, and efficient execution of Fortran programs for use on a variety of computing systems. Coverage includes: characters, lexical tokens, and source form; intrinsic and derived data types; use of data object. Also includes detailed annexes and tables.