|A table cell for table integrity checking.
|Represents a contiguous range of columns that was established by a single
element and that does not yet have cells in it.
|Compares cells using their
|Represents a row group (explicit or implicit) for table integrity checking.
|Represents an XHTML table for table integrity checking.
|Checks XHTML table integrity: overlapping cells, spanning past the end
of row group, etc.
|Compares cells first by their
bottom field and then by their