How can I get f:selectItem to do not be rendered (as his parent) ?

Question

I've something like this :
<af:showDetailItem text="TEXT1" id="sdi123" rendered="#{is123Rendered}">
<f:subview id="sub123" rendered="#{is123Rendered}">
<jsp:include page="/tech/fragments/PROBLEM.jsff"/>
</f:subview>
</af:showDetailItem>
The idea is that if "is123Rendered" is true then this showDetailItem will be rendered, else it will be rendered elsewhere
So at the elsewhere place, I use the "same" af:showDetailItem/subview/include with another id and with rendered="#{not is123Rendered}"
It would be normal I get duplicates if rendered was true everywhere since the jsff is included 2 times
I've tried to replace rendered="#{not is123Rendered}" to rendered=false to be sure the problem does not come from the getter/variable
But it seems like f:selectItem does not care about the rendered attribute of his grand-grand-...-parent ... so I get this error :
java.lang.IllegalStateException: Duplicate component id: 'sH1:sub123:ttSGen:si1234', first used in tag: 'com.sun.faces.taglib.jsf_core.SelectItemTag'
In PROBLEM.jsff I've :
<af:selectOneChoice id="soc1234" value="#{something.output}" disabled="true" label="Select something">
<f:selectItem itemLabel="#{something.output}" itemValue="#{something.output}" id="si1234"/>
</af:selectOneChoice>
I've tried to comment/remove every selectOneChoice and then the page loads without any error.
It seems that f:selectItem are generating duplicates.
I've tried to put af:selectOneChoice rendered attribute to false, same problem.
f:selectItem does not have a rendered attribute ...
I'm thinking about using conditional JSP include instead of rendered attribute : http://forums.sun.com/thread.jspa?threadID=676322
But I'm not sure it's possible/elegant to to this using ADF.
Any idea ?
Thanks,
JP

Answer 1

Finally I've used :
<af:showDetailItem text="TEXT1" id="sdi123" rendered="#{is123Rendered}">
*<c:if test="${is123Rendered}">*
<f:subview id="sub123" rendered="#{is123Rendered}">
<jsp:include page="/tech/fragments/PROBLEM.jsff"/>
</f:subview>
*</c:if>*
</af:showDetailItem>
And now it's working.