Core.Declarations.GlobalDeclarations

Classification

Name	Global Declarations
Short Description	OTX global declarations data model
Class	OTX Core
Pre-Conditions	-
Specified by	ISO 13209-2

Introduction

In the global declaration block:

• Global Constant
• Document Variable
• Context Variable

can be declared. These elements have a global validity. That is, they can both within the document in which they are declared, as well as in other documents, see Imports are used.

Semantics

Global Constant

The value of a global constant is set at design time and can not be changed at runtime. For global constants have the following Visibilities:

• Private (default)
• Package
• Public

A constant has a Type and a corresponding type value.

Document Variable

The value of a global variable can be changed at runtime. Global variables can only be used in the same document. They have, therefore only the following Visibilities:

• Private (fix)

A variable has a Type and a corresponding type the initial value (default value).

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, Logged in User, etc., see the Context Concept. Context variables have one of the following visibilities:

• Private (default)
• Package
• Public

A context variable has a Type and a corresponding type the default value.

Checker rules

Core_Chk051	Immutability of constants, input parameters and context variables
Core_Chk009	Mandatory constant initialisation

See also

Validation (OTX-Checker)
​​Naming Conventions
Imports
Visibilities
Validities
Signatures
Parameter Declarations
Procedures
Comments