Attributes

Attributes define the properties of an object.

Any class defines its own attributes.

The class of an attribute defines in which context it can be used:

• I - the attribute can be used at object creation time
• S - the attribute can be set
• G - the attribute can be read (got)
• N - the attribute is notified by the object

An attribute may be in more than a class, e.g. ACTIVATE attribute of Window class is ISGN: it can be used at Init-time, set, read and it is notified by RxMUI.

The type of an attribute defines its format:

• S - the attribute is a String
• N - the attribute is a Number
• M - the attribute is Mixed : it can be set as a string or a number
• C - the attribute is a Char (a S with len 1)
• B - the attribute is a Boolean (it is N too)

Other properties are:

• ND - needed in a context (e.g. CONTENTS attribute of Window class is needed at Init time and so it is IND)
• G2N - the attribute is a S(tring) but when it is read or notified, it becomes a N(umber) (e.g. ACTIVE attribute of List class may be specified ad Init or Set time as a string or a number - it is Mixed - but when it is read or notified it is always a number, so it is a G2N)