collection
An argument that is specified as a collection can be:
One or more values. For example, "7,9,583".
A reference to a single table cell. For example, "B2".
A reference to a single range or single array of table cells. For example, "B2:B7" or "B2:E7".
Several references to single table cells separated by operators. For example, "B2 B3 B7". In Numbers, these cell references can be in different tables and in different sheets.
An array returned by an array function.
A collection has an additional attribute defining the type of values referenced cells can contain.