Elements.xml Location value for 'View Item' to add Custom Action

Question

In our Elements.xml file we add a custom action for the EditControlBlock which calls our own edit URL.

Now we want to do a similar thing for when the user click on the 'View Item' ribbon element. However, I haven't been able to find the correct value for the Location attribute on our Elements.xml feature file to redirect the user to our URL instead of the default DispForm.aspx action.

This page on MSDN suggests that maybe Ribbon.ListItem.Manage.ViewProperties is the correct value, but alas, no success.