Question about rtexprvalue

I understand that in a custom tag attribute declared as rtexprvalue false, you can only put in a string literal into the value of the tag in the JSP.

And if rtexprvalue is true, you can put in an EL expression or other dynamic expression.

My question is why is there this distinction? I can't picture why this would be an issue...why wouldn't everything be declared as true, because in that case you can choose to use dynamic or literal expressions, is that correct?

I imagine there's a worthwhile reason for having it, but I just can't figure out what it is.

Please clarify if possible.

Thanks.

[636 byte] By [lightbulb4321a] at [2007-9-25]