Escaping necessary in Tag attributes?

[Juergen Weber <we...@yahoo.com>]

I tried to use a map based EL expression

${folder.variables["copyright"]}

as Tag attribute like 

<jg:if exists="${folder.variables["copyright"]}">

But there was a JasperException "equal symbol
expected"

When I included backslashes, it worked:	

<jg:if exists="${folder.variables[\"copyright\"]}">

I think this is a bug or a feature? I did find nothing
in the JSP 2.0 spec about having to escape quotes in
Tag attributes, especially as in normal usage it is
not necessary.

At least the error message is not very helpful.

Juergen



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