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Variables, Objects, Functions and Methods

Variables are used to store values and have unique names that can be used to manipulate the stored data. In PML 2, variables are objects that have predefined types which specify their possible data values and methods. Each object has a set of methods that can retrieve or change the object's data values. Object types must be defined before users can create objects of that type to store and manipulate data using the object's methods.

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93 views1 page

Variables, Objects, Functions and Methods

Variables are used to store values and have unique names that can be used to manipulate the stored data. In PML 2, variables are objects that have predefined types which specify their possible data values and methods. Each object has a set of methods that can retrieve or change the object's data values. Object types must be defined before users can create objects of that type to store and manipulate data using the object's methods.

Uploaded by

Dolapo Steve
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Variables, Objects, Functions and Methods

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Software Customisation Guide


Variables, Objects, Functions and Methods

Variables, Objects, Functions and Methods


PML Variables
Variables are used to store values. Variables have names. The value that is stored can be changed but the name
is fixed. The user chooses the names and decides what is stored by each variable.
The variables used in PML 2 are objects:

Every object (variable) has a unique name.

An object has a set of functions associated with it, which can be called to manipulate this data. These
functions are called methods.

Some methods change the data held by the object, some return a result derived from the data, and some
methods do both.

The data that an object can hold and the functions that are available are fixed by the object type (sometimes
called the objects class).

Before the user can create an object, the object type must have been defined. The object type definition
specifies what the members and methods are for that type of object.

1974 to current year. AVEVA Solutions Limited and its subsidiaries. All rights reserved.

http://help.aveva.com/AVEVA_Everything3D/1.1.0.25/SOFTCG/SOFTCG3.03.01.html

6/13/2016

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