ISMULTISELECT
This function returns TRUE if a referenced element is defined with multiselect XML, and FALSE if it is not. You might use ISMULTISELECT to determine, for example, whether writeback is allowed on a specific cell. You cannot writeback on a cell that is defined with multiselect XML because such cells are locked.
Syntax
=ISMULTISELECT("XML_multiselect")
Example
In this example, cell C12 contains a multiselect XML variable that was created with MULTISELECTCREATE and populated with MULTISELECTADD. The formula returns TRUE.
=ISMULTISELECT(C12)