question about gpd.xml

[zhgd]

I want develop a monitor-application about jbpm,but I can't understand gpd.xml?

\<node name="evaluate web order" x="281" y="120" width="140" height="40">
 <transition name="ok">
 <label x="5" y="-10"/>
 </transition>
 <transition name="more info needed">
 <label x="5" y="-10"/>
 <bendpoint w1="-114" h1="-35" w2="116" h2="-35"/>
 </transition>
 </node>

what's mean about 'x' and 'y'?
what's mean about 'w1','h1','w2' and 'h2'?

thanks

[kukeltje]

gpd.xml is the file used by the designer to position the nodes in the visual part of the designer. x and y are suprisingly positions, the w1...h2 are the relative points where the transitions make an angle