1) Log in as student, student.
2) Select the "Tab Layout" link in the top right area of the uPortal. The portal fades a bit and an Edit Tabs window appears in the center of the page allowing the user to move the tabs.
3) Move the Main Student Tab to the left of the Useful News tab.
4) Press Done.
As can be seen the tab was successfully moved. It shouldn't have been allowed. Be default the Userful News tab from the news-lo fragment is movement restricted, ie: it contains an attribute of dlm:moveAllowed="false". Hence, any tab with a lower precedence as denoted by an attribute of dlm:precedence with a numeric value or by the absense of such an attribute which indicates a value of zero, should not be allowed to "hop" a restricted tab with a higher precedence.
You can view these custom attributes and the entire layout in general using the recently contributed LayoutExpose channel. See the DLM Admin Guide, last section for accessing the code and details on features and publishing steps:
http://www.ja-sig.org/wiki/display/UPM/DLM+Administration+Guide
Bug
Resolved
Major
Tab Layout editor doesn't honor DLM restrictions
It looks like while channel attributes such as "dlm:moveAllowed" are being added to the XML supplied to the theme transformation, the equivalent tab attributes are not available. What do we need to do to get the relevant data into the XML so the theme transform can create the appropriate javascript?