Request for New Attribute Types: Reference to other issue,List of references, Generate New Task

Hi, I dont know if this is already covered, but I think there could be some good extra Attribute Types:

Reference to other issue.

Also, it would be nice to also have a new Attribute type : Generate New Task ( Text = Title of new task )
This way , you could add the type to a bug or feature request and create a task from it, and if necessary assign partial tasks to several other people.

List of references could also be handy then, because you would see a list of issues that are related (both ways)