SN EN 61691-1 : 1997

FOREWORD
Section 0 General
            0.1 Scope and object
            0.2 Structure and terminology
                 0.2.1 Syntactic description
                 0.2.2 Semantic description
                 0.2.3 Front matter, examples notes,
                        references and annexes
                 0.2.4 Normative reference
Section 1 Design entities and configurations
            1.1 Entity declarations
                 1.1.1 Entity header
                        1.1.1.1 Generics
                        1.1.1.2 Ports
                 1.1.2 Entity declarative part
                 1.1.3 Entity statement part
            1.2 Architecture bodies
                 1.2.1 Architecture declarative part
                 1.2.2 Architecture statement part
            1.3 Configuration declarations
                 1.3.1 Block configuration
                 1.3.2 Component configuration
Section 2 Subprograms and packages
            2.1 Subprogram declarations
                 2.1.1 Formal parameters
                        2.1.1.1 Constant and variable
                                 parameters
                        2.1.1.2 Signal parameters
                        2.1.1.3 File parameters
            2.2 Subprogram bodies
            2.3 Subprogram overloading
                 2.3.1 Operator overloading
                 2.3.2 Signatures
            2.4 Resolution functions
            2.5 Package declarations
            2.6 Package bodies
            2.7 Conformance rules
Section 3 Types
            3.1 Scalar Types
                 3.1.1 Enumeration types
                        3.1.1.1 Predefined enumeration types
                 3.1.2 Integer types
                        3.1.2.1 Predefined integer types
                 3.1.3 Physical types
                        3.1.3.1 Predefined physical types
                 3.1.4 Floating point types
                        3.1.4.1 Predefined floating point
                                 types
            3.2 Access types
                 3.2.1 Array types
                        3.2.1.1 Index constraints and
                                 discrete ranges
                        3.2.1.2 Predefined array types
                 3.2.2 Record types
            3.3 Access types
                 3.3.1 Incomplete type declarations
                 3.3.2 Allocation and deallocation of objects
            3.4 File types
                 3.4.1 File operations
Section 4 Declarations
            4.1 Type declarations
            4.2 Subtype declarations
            4.3 Objects
                 4.3.1 Object declarations
                        4.3.1.1 Constant declarations
                        4.3.1.2 Signal declarations
                        4.3.1.3 Variable declarations
                        4.3.1.4 File declarations
                 4.3.2 Interface declarations
                        4.3.2.1 Interface lists
                        4.3.2.2 Association lists
                 4.3.3 Alias declarations
                        4.3.3.1 Object aliases
                        4.3.3.2 Nonobject aliases
            4.4 Attribute declarations
            4.5 Component declarations
            4.6 Group template declarations
            4.7 Group declarations
Section 5 Specifications
            5.1 Attribute specification
            5.2 Configuration specification
                 5.2.1 Binding indication
                        5.2.1.1 Entity aspect
                        5.2.1.2 Generic map and port map
                                 aspects
                 5.2.2 Default binding indication
            5.3 Disconnection specification
Section 6 Names
            6.1 Names
            6.2 Simple names
            6.3 Selected names
            6.4 Indexed names
            6.5 Slice names
            6.6 Attribute names
Section 7 Expressions
            7.1 Expressions
            7.2 Operators
                 7.2.1 Logical operators
                 7.2.2 Relational operators
                 7.2.3 Shift operators
                 7.2.4 Adding operators
                 7.2.5 Sign operators
                 7.2.6 Multiplying operators
                 7.2.7 Miscellaneous operators
            7.3 Operands
                 7.3.1 Literals
                 7.3.2 Aggregates
                        7.3.2.1 Record aggregates
                        7.3.2.2 Array aggregates
                 7.3.3 Function calls
                 7.3.4 Qualified expressions
                 7.3.5 Type conversions
                 7.3.6 Allocators
            7.4 Static expressions
                 7.4.1 Locally static primaries
                 7.4.2 Globally static primaries
            7.5 Universal expressions
Section 8 Sequential statements
            8.1 Wait statement
            8.2 Assertion statement
            8.3 Report statement
            8.4 Signal assignment statement
                 8.4.1 Updating a projected output waveform
            8.5 Variable assignment statement
                 8.5.1 Array variable assignments
            8.6 Procedure call statement
            8.7 If statement
            8.8 Case statement
            8.9 Loop statement
            8.10 Next statement
            8.11 Exit statement
            8.12 Return statement
            8.13 Null statement
Section 9 Concurrent statements
            9.1 Block statement
            9.2 Process statement
            9.3 Concurrent procedure call statements
            9.4 Concurrent assertion statements
            9.5 Concurrent signal assignment statements
                 9.5.1 Conditional signal assignments
                 9.5.2 Selected signal assignments
            9.6 Component instantiation statements
                 9.6.1 Instantiation of a component
                 9.6.2 Instantiation of a design entity
            9.7 Generate statements
Section 10 Scope and visibility
            10.1 Declarative region
            10.2 Scope of declarations
            10.3 Visibility
            10.4 Use clauses
            10.5 The context of overload resolution
Section 11 Design units and their analysis
            11.1 Design units
            11.2 Design libraries
            11.3 Context clauses
            11.4 Order of analysis
Section 12 Elaboration and execution
            12.1 Elaboration of a design hierarchy
            12.2 Elaboration of a block header
                 12.2.1 The generic clause
                 12.2.2 The generic map aspect
                 12.2.3 The port clause
                 12.2.4 The port map aspect
            12.3 Elaboration of a declarative part
                 12.3.1 Elaboration of a declaration
                        12.3.1.1 Subprogram declarations and
                                 bodies
                        12.3.1.2 Type declarations
                        12.3.1.3 Subtype declarations
                        12.3.1.4 Object declarations
                        12.3.1.5 Alias declarations
                        12.3.1.6 Attribute declarations
                        12.3.1.7 Component declarations
                 12.3.2 Elaboration of a specification
            12.4 Elaboration of a statement part
            12.5 Dynamic elaboration
            12.6 Execution of a model
Section 13 Lexical elements
            13.1 Character set
            13.2 Lexical elements, separators and delimiters
            13.3 Identifiers
            13.4 Abstract literals
            13.5 Character literals
            13.6 String literals
            13.7 Bit string literals
            13.8 Comments
            13.9 Reserved words
            13.10Allowable replacements of characters
Section 14 Predefined language environment
            14.1 Predefined attributes
            14.2 Package STANDARD
            14.3 Package TEXTIO
Annex A Syntax summary
Annex B Glossary
Annex C Potentially nonportable constructs
Annex D Changes from IEEE Std 1076-1987
Annex E Related standards
Index

Specifies accurately the VHDL language, mainly for implementors of tools which support the language, together with advanced users of the language.