2.1.748 Part 4 Section 3.9.3, cellMetadata (Cell Metadata)
For additional notes that apply to this portion of the standard, please see the notes for valueMetadata, §3.9.17(a) .
a. The standard states that the values of the count attribute are defined by the XML Schema unsignedInt datatype.
Office requires that the count attribute has a maximum value of 2147483647.