<process name="decisionsUsingTransitions" xmlns="http://jbpm.org/4.0/jpdl">
<start g="72,168,48,48" name="Start">
<transition to="Decision"/>
</start>
<decision expr="#{opcao}" g="192,168,48,48" name="Decision">
<transition g="217,84:23,-21" name="Opção A" to="Opção A"/>
<transition g="-26,-20" name="Opção B" to="Opção B"/>
<transition g="217,302:22,5" name="Opção C" to="Opção C"/>
</decision>
以上是 JBPM jpdl.xml 文件的一部分,我想知道后面的数字(即 72,168,48,48)g=
是什么意思?