Determines whether the value of an attribute is set to a zero-length String.
Returns true if the attribute value is a zero-length String; otherwise, returns false.
A zero-length string can be compared to the string "". It is different from a null, whose presence is detected by the Is Null function block.
If a collaboration needs to retrieve an attribute value and then do something with it, it can call Is Blank and Is Null to check that it has a value before retrieving the value.
This function block is based on the BusObj.isBlank() method. For more information, see isBlank().