Luke,

If you are adding an argument in views and want to check if its the parent if TID 3, you can do it this way.
Add the argument as term name or TID, then in the validator, you can write php code to check that.
use function taxonomy_get_parents to get the parent of that TID.

Hope this helps.

On Tue, Aug 2, 2011 at 1:44 PM, Luke <drupal@lists.tacticus.com> wrote:
Another views question:

It would be convenient, if I could have a view match on a term argument,
if the referenced TID was a child of another term.

So if TIDs 80 through 200 were children of TID 3, rather than coding for
the range (which might get out of range TIDs added to it later), is there
some way I could have the view check whether the passed argument of TID
120, is in fact a child term of TID 3?

Hopefully that's not stupidly basic.

Luke
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Regards,
Vaibhav Jain