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'''The Purpose'''

The purpose of this document is make the trace easier. Typically, to begin trace, the fast way is to run a test case and then set the break points to understand the overall&nbsp;'''execution flow'''.

So, each document here should contain the following

# Introduction
#* explain the basic datastructure, definitions
#* add UML class diagram when necessary
# The purpose of this trace
# The test case
# set a set of break points in files
# go through each break point and briefly explain the&nbsp;'''execution flow'''&nbsp;in source code
#* add sequence diagram when necessary
# when more details should be understood, point the documents in&nbsp;briefdocument&nbsp;for the reader to follow up.
# Any Debugging Aids that are already implemented for the topic
# Sometimes, source code can be copied.



'''Major Topics'''

# [[The major threads in DIVA and how it interacts with Minerva]]
# [[WOPM (Watch Object Pool Module)]]
# [[Command Agent]]
# [[xMappingTree]]
# [[Mapping Description String (MDS)]]
# [[Mapping Dialogs]]
# [[How VMs are constructed from a xMappingTree]]
# [[How input is triggered and handle in Ogre]]
# [[How a VM's VMPick() VMAnimation() and VMDragged() are called?]]
# [[What kind of races can occurs if you are not cautious enough?]]
# [[How the key-frame animation is triggered and the whole execution flow is done?]]

'''layout'''

# [[Right Click on a VM and pop up a menu display explore and layout selection]]
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