thank for your answer.
that now , we are ready to use the svg file that describe all process through the graphical representation.
for example: now , the process has arrive at the first node
http://community.jboss.org/servlet/JiveServlet/downloadImage/2-642574-17631/310-445/out1.png
so, i can get some infos from bpmn2 file when get the pending usertask info
i think that should be related between the file(*.bpmn) and the file (*.svg) .
then i can use some bpmn file info to control the svg file.
please help me!