2.1.158 Part 1 Section 17.4.55, tblLook (Table Style Conditional Formatting Settings)
a. The standard states that when the tblLook element is omitted, the bitmask of table style options on the current table shall be assumed to be 0x0000.
In Word, when the tblLook element is omitted, the bitmask of table style options on the current table is assumed to be 0x04A0.
b. The standard states there are six conditional formatting options that can be set in tblLook.
In addition to the six listed conditional formatting options, Word supports the following additional options and combinations:
0x00A0 - Allow NE Cell conditional formatting. This and the following bitmasks are combinations of two bits. These bits allow an intersection of the appropriate row and column.
0x0120 - Allow NW Cell conditional formatting.
0x00C0 - Allow SE Cell conditional formatting.
0x0140 - Allow SW Cell conditional formatting.
c. The standard specifies a set of attributes on this element.
Word reads the val attribute specified in "[ISO/IEC-29500-4] §14.3.12; Additional attribute for tblLook element (Part 1, §17.4.56)" if, and only if, none of the attributes specified in this subsection are present.