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1.1.2 Structure

This International Standard contains thirteen sections, fourteen annexes, and an index.
The core of the Ada language consists of:
The following Specialized Needs Annexes define features that are needed by certain application areas:
The core language and the Specialized Needs Annexes are normative, except that the material in each of the items listed below is informative:
All implementations shall conform to the core language. In addition, an implementation may conform separately to one or more Specialized Needs Annexes.
The following Annexes are informative:
Each section is divided into clauses and subclauses that have a common structure. Each section, clause, and subclause first introduces its subject. After the introductory text, text is labeled with the following headings:
Name Resolution Rules
Compile-time rules that are used in name resolution, including overload resolution.
Legality Rules
Rules that are enforced at compile time. A construct is legal if it obeys all of the Legality Rules.
Static Semantics
A definition of the compile-time effect of each construct.
Post-Compilation Rules
Rules that are enforced before running a partition. A partition is legal if its compilation units are legal and it obeys all of the Post-Compilation Rules.
Dynamic Semantics
A definition of the run-time effect of each construct.
Bounded (Run-Time) Errors
Situations that result in bounded (run-time) errors (see 1.1.5).
Erroneous Execution
Situations that result in erroneous execution (see 1.1.5).
Implementation Requirements
Additional requirements for conforming implementations.
Documentation Requirements
Documentation requirements for conforming implementations.
Metrics that are specified for the time/space properties of the execution of certain language constructs.
Implementation Permissions
Additional permissions given to the implementer.
Implementation Advice
Optional advice given to the implementer. The word ``should'' is used to indicate that the advice is a recommendation, not a requirement. It is implementation defined whether or not a given recommendation is obeyed.

Examples illustrate the possible forms of the constructs described. This material is informative.

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