<document source="tables12.rst">
    <paragraph>
        Complex spanning pattern (no edge knows all rows/cols):
    <table>
        <tgroup cols="5">
            <colspec colwidth="11">
            <colspec colwidth="13">
            <colspec colwidth="12">
            <colspec colwidth="13">
            <colspec colwidth="11">
            <tbody>
                <row>
                    <entry morerows="3">
                        <paragraph>
                            W/NW cell
                    <entry morecols="3">
                        <paragraph>
                            N/NE cell
                <row>
                    <entry morerows="1">
                        <paragraph>
                            W/NW center
                    <entry morecols="1">
                        <paragraph>
                            N/NE center
                    <entry morerows="3">
                        <paragraph>
                            E/SE cell
                <row>
                    <entry>
                        <table>
                            <tgroup cols="1">
                                <colspec colwidth="8">
                                <tbody>
                                    <row>
                                        <entry>
                                            <paragraph>
                                                Middle
                                                table
                    <entry morerows="1">
                        <paragraph>
                            E/SE center
                <row>
                    <entry morecols="1">
                        <paragraph>
                            S/SE center
                <row>
                    <entry morecols="3">
                        <paragraph>
                            S/SW cell
