2.1.79 Section 8.2.1, Column Description
The standard defines the element <table:table-column>: This element is supported in WordPad.
The standard defines the attribute table:default-cell-style-name within the element <table:table-column>: This attribute is not supported in WordPad.
The standard defines the attribute table:number-columns-repeated within the element <table:table-column>: WordPad supports the table:number-columns-repeated attribute on Read. On Save, this attribute is not written out.
The standard defines the attribute table:style-name within the element <table:table-column>: This attribute is supported in WordPad.
The standard defines the attribute table:visibility within the element <table:table-column>: This attribute is not supported in WordPad.