Difference between revisions of "Core.Declarations.GlobalDeclarations"
| Line 46: | Line 46: | ||
== See also == | == See also == | ||
| − | [[Core. | + | [[Core.Validation|Validation (OTX-Checker)]] <br/> |
| − | [[General. | + | [[General.NamingConventions|Naming Conventions]] <br/> |
| − | [[Core. | + | [[Core.Imports|Imports]] <br/> |
| − | [[Core. | + | [[Core.Visibilities|Visibilities]] <br/> |
| − | [[Core. | + | [[Core.Validities|Validities]] <br/> |
| − | [[Core. | + | [[Core.Signatures|Signatures]] <br/> |
| − | [[Core. | + | [[Core.Parameters|Parameter Declarations]] <br/> |
| − | [[Core. | + | [[Core.Procedures|Procedures]] <br/> |
| − | [[Core. | + | [[Core.Comments|Comments]] |
Revision as of 10:42, 16 February 2016
Contents
Classification
| Name | Global Declarations |
| Short Description | Global variables and constants |
| Class | OTX Core |
| Pre-Conditions | - |
| Specified by | ISO 13209-2 |
Introduction
The following elments can be declared in the global declaration block:
- Global Constants
- Context Variables
- Document Variables
These elements have a global scope. That is, they can be used within the document in which they are declared, as well as in other documents, see Imports.
Semantics
Global Constant
The value of a global constant is set at design-time and can not be changed at runtime. The global constants must have one of the following Visibilities:
- Private (default)
- Package
- Public
A constant has a Type and a value corresponding to the type.
Global Variable (Document Variable)
The value of a global variable can be changed at runtime. Global variables can only be used in the same document. Therefore, they only have one following Visibility:
- Private (fixed)
A variable has a Type and an initial value (default value) corresponding to the type.
Environment Variable (Context Variable)
Context variables behave like global constants. However, they have a special meaning. They represent environment-related data, such as vehicle type, name of workshop, user login name, etc., see the Context Concept. The context variables must have one of the following Visibilities:
- Private (default)
- Package
- Public
A context variable has a Type and a default value corresponding to the type.
Checker rules
| Core_Chk009 | Mandatory constant initialisation |
| Core_Chk051 | Immutability of constants, input parameters and context variables |
| Core_Chk052 | Identifier shadowing |
See also
Validation (OTX-Checker)
Naming Conventions
Imports
Visibilities
Validities
Signatures
Parameter Declarations
Procedures
Comments
