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The dd tag 'message-driven-destination' is optional ?

 
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Is The dd tag <message-driven-destination> optional ?
 
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This kind of question is usually best answered by the spec. In appendix B, you can find the following:


<!ELEMENT message-driven (description?, display-name?, small-icon?,
large-icon?, ejb-name, ejb-class, transaction-type,
message-selector?, acknowledge-mode?,
message-driven-destination?, env-entry*, ejb-ref*,
ejb-local-ref*, security-identity?, resource-ref*,
resource-env-ref*)>



After message-driven-destination, there is a question mark. This means that the element can appear 0 or 1 time as a child of the message-driven element.
 
Dhondiba Joshi
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