On Sun, May 30, 2010 at 4:13 AM, Allan Odgaard <mailinglist@textmate.org> wrote:
On 29 May 2010, at 23:16, Joshua Shapiro wrote:

[...] Is there a way I can format this string data so that textmate

recognizes it is a columnar selection?

You need to store a property list as the OakTextMatePboardType with a ‘content’ key (actual string) and ‘rectangular’ set to the string value YES.

Perfect. Thanks.
Note that this is not a documented pasteboard type so no guarantees about future compatibility with this format etc.