Hi Junilu,
Its not about "0", i know about multiplicity. Its about a "O" on the arrow located at the center of the arrow.
<pre> O
_______________></pre>
i guess its something related to asynchronous, or time out related symbol. I have seen it long time back some where, but i don't remember the resource.
[ March 14, 2002: Message edited by: Ram Dhan Yadav K ]
[ March 14, 2002: Message edited by: Ram Dhan Yadav K ]
[ March 14, 2002: Message edited by: Ram Dhan Yadav K ]
[ March 14, 2002: Message edited by: Ram Dhan Yadav K ]