Created attachment 25926 [details]
A JSP file which show three different use cases of the jsp:attribute omit attribute

I'm trying to make use of the new omit-attribute in the jsp:attribute. This new feature of JSP 2.2 is described in the Specs in JSP.5.10.

Table JSP.5-7 Attributes for the <jsp:attribute> standard action

omit (optional) Valid values are true and false. If true, and when
used with <jsp:element>, the attribute in the element being
ouput is omitted. Ignored when used with a standard or
custom action. Defaults to false.

There is an introduction text here: 
http://www.ibm.com/developerworks/forums/thread.jspa?messageID=14471459

and I'm trying to make this work in my setup but I'm failing. Or I don't get the point.

The following works:
<jsp:element name="p">
	<jsp:attribute name="style" omit="true" >color:red</jsp:attribute>

The following does NOT work:
<jsp:element name="p">
	<jsp:attribute name="style" omit="<%=jspExpressionTrue%>" >color:red</jsp:attribute>

The following does NOT work either:
<jsp:element name="p">
	<jsp:attribute name="style" omit="${trueEL}" >color:red</jsp:attribute>

Full JSP code in my attachment. I actually use the JSP-document (XML / JSPX-)syntax, but it does not work in any of the JSP dialects.


So I don't get the point why I should not be able to use EL in the omit-attribute, because then it's kind of useless.


I use
Windows Vista 64bit
JavaSE 1.6
Apache Tomcat 7.0.0 and Apche Tomcat 7.0.2beta
JSTL 1.1.2

All setup together in a typical "Dynamic Web Project" in Eclipse 3.6 Helios