Hello.  I have an e-mail template that is used by a workflow e-mail alert.  The e-mail alert is based on the workorder__c field.  I also have a related object (via lookup relationship) called parts__c. 

I am able to display the workorder__c.workordername__c field values in e-mails created from this template.  However, I am getting blanks where I am trying to display parts__r.partname__c.

In short, is there any way to display data from related objects in an HTML template...or can you only display data from a specific object?

Hope this makes sense.  Thanks in advance.