[Trac] Linking Tickets

[Simpson, Troy (NIH/NIEHS) [E]]

Is there a way to link tickets together?

For example, I have an enhancement ticket to add functionality to some
software.  To complete this enhancement, I need to perform some task
like purchase some things, etc.

I would like t link the enhancement ticket with the supporting task
tickets.
Main Enhancement
--Task 1
--Task 2
--Task 3
--Defect 1
----Defect 1.1
----Defect 1.2
Etc.

Is this possible or should I be doing this another way in Trac?

--
Troy Simpson
  IT Specialist, OCPDBA, SCSA, MCSE
National Institute of Environmental Health Sciences 
PO Box 12233 (MD NH-03)
Research Triangle Park, NC USA 27709-2233
ph.919.541.0902 | fax.919.541.0865