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From Vance huang <>
Subject [scxml] trasition tag with type=internal in compound state issue
Date Mon, 06 Jun 2011 23:11:15 GMT

According to the SCXML spec, the following was stated:
"The behavior of transitions with 'type' of "internal" is identical, except in 
the case of a transition whose source state is a compound state and whose 
target(s) is a descendant of the source. In such a case, an internal transition 
will not exit and re-enter its source state, while an external one will, as 
shown in the example below."

I am trying to do something similar like the following:
   <state id="s1" initial="s11">       <onentry>         <log expr="entering

S1"/>         </onentry>       <onexit>          <log expr="'leaving s1'"/>
</onexit>            <state id="s11">        <onentry>         <log 
expr="entering s11"/>        </onentry>         <onexit>            <log

expr="'leaving s11'"/>         </onexit>      </state> 

     <state id="s12">        <onentry>         <log expr="entering s12"/>
</onentry>         <onexit>            <log expr="'leaving s12'"/>     
</onexit>      </state>            <transition event="e" target="s12" 
type="internal">         <log expr="'executing transition'"/>      </transition>

Assuming I am in s11 when event e fired. But it always log "leaving s1" before 
log "executing transition" which means going out of S1 even if the internal type 
was set. Am I missing something in the spec? 
Also, I am not sure how can I search in the archive to see if this question has 
been asked before. Can you let me know? Thanks!


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