I've been unable to specify table classes in the classes pseudo-row from "outside" the table:
Can't do it with a variable:
<$vars varclasses="myclass1 myclass2">
|<<varclasses>>|k
...
</$vars>
Can't do it with a macro:
\define macroclasses() myclass1 myclass2
|<<macroclasses>>|k
...
Can't do it by transcluding from another tiddler:
I also experimented with a <$text> widget in case wikification was involved, but without success.
It is possible to load a table cell from variables, macros and transclusion, so I assume my problem is that the classes pseudo-row is handled in a special manner. If so, is there a way around that mechanism to load the class names from outside the table?
Note: I realise I can achieve my goal by creating my own class, copying the content of other classes into it, and then adding the new class name directly to the table classes pseudo-row. I'd still like to pursue this possibility, though, if possible...