Const True or false.
Contains an error.
A number. Note - Dates are expressed as formatted numbers.
A value that is referenced in a single reference table. Excel does this for strings but we allow this for any any object type (useful for strings and RichData)
A complex data type that is represented as a json.
A string.
When The cell does not contain a value but still contains a style reference.
The type of cell within a sheet. These mostly follow the OOXML types.