iAnywhere Water System User Manual

Chapter 2 Building an Object-Oriented Model

Attribute properties

An attribute has the following properties:

Property Description

Maximum

length

Parent Object to which the attribute belongs to 254

Name Name of the attribute 254

Code Reference name for the attribute 254

Comment Descriptive comment for the attribute —

Stereotype Subclassification of an attribute derived from an

existing one. Extends the semantics of an attribute

without changing it's structure

—

Data Type Set of instances that share the same operations,

abstract attributes, and relationships, and

semantics

—

Visibility Visibility of the attribute, whose value denotes

how it may be seen outside its enclosing name

space

—

Multiplicity Specification of the range of allowable

cardinalities that a set may assume

—

Initial value Initial value of the attribute —

Changeability Specifies that the value of the attribute cannot be

modified once the object has been initialized

—

Length Maximum number of characters —

Precision Number of places after the decimal point, for data

values that can take a decimal point

—

Domain Name of the associated domain —

Static Defines the attribute as static, meaning it cannot

be modified

—

Derived Indicates that the attribute is a calculated formula —

Identifier When selected, converts the attribute into a

primary key after generation of the OOM to a

PDM

—

Property When selected, converts the attribute into a

property after generating PowerBuilder objects

from the OOM

—