Although ordinal identifiers give 100%uniqueness in learning a object ,why do w

Although ordinal identifiers give 100%uniqueness in learning
a object ,why do we use mandatory and assistive properties
first to check the uniqueness of object?????

Question Posted / mani

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Although ordinal identifiers give 100%uniqueness in learning a object ,why do we use mandatory and ..

Answer / uday

With ordinal identifiers 100% uniqueness is not possible.

Say the object in the application is moved to another
location(location identifier fails).

Another object item of the same type is inserted or object
item is moved(then index identifier fails).

Close one browser(creation time identifier fails).

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Although ordinal identifiers give 100%uniqueness in learning a object ,why do we use mandatory and ..

Answer / mani

bcoz no consistency in ordinal identifiers.. as it is of
three types
location- its give the postion of object inside the window.
index-its gives the value for each object inside the window.
creation time- it is used in web environment(browser)..

as the identifiers location and index are not constant if
any field is introduce in middle of application.........

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