Applying para format to top-left cell in table

[Steve Rickaby]

I'm struggling with context rules here.

I need to apply a specific para format in the top-left cell of a table. The 
tables structure is:

TableType
        |
        TableHeading
                |
                TableRow
                        |
                        TableCell
                                |
                                Para <--- context rule to fire here
                        |
                        TableCell
                                |
                                Para
        TableBody
                |
                TableRow
                        |
                        TableCell
                                |
                                Para
                        |
                        TableCell
                                |
                                Para (etc)

The problem is that there seems to be no way to formulate a context rule that 
identifies the para element shown above, because although it's enclosing cell 
would fire a unique {first} rule, the rule must actually be in the para 
element's rule set, and there's no way to say 'if your parent is first, 
then...'. Or is there?

Clearly, changing the table structure so that it used a different structure 
might help, but there's too much existing material for that.

-- 
Steve