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empty value

Empty values are defined for each data type as follows:

Numeric values are empty, when they are 0. String, MEMO and binary values are empty, when the value length is 0. Character values are empty, when the field contains only blanks.

A complex structure is empty, when all property instances are empty. A reference collection is empty, when it has no elements. An array is empty, when all array elements are empty.

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