https://issues.apache.org/bugzilla/show_bug.cgi?id=50194
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
--- Comment #2 from Mark Thomas <ma...@apache.org> 2010-11-12 13:53:18 EST ---
There are a handful of different specifications involved here.
First of all there is the JSP 2.1 specification. It states in Table JSP.1-9
that:
A prefix must follow the naming convention specified in the XML namespaces
specification.
So far so good, '-' is permitted by the XML namespaces specification.
Then we move to the EL 2.1 specification. Unfortunately, it is more
restrictive. 1.15 defines the syntax as:
[ns:]f([a1[,a2[,...[,an]]]])
where ns is a namespace. Again, so far so good.
However in the collected syntax there is the following:
FunctionInvocation::=(Identifier ‘:’)? Identifier ‘(‘
( Expression ( ‘,’ Expression )* )? ‘)’
and
Identifier ::= Java language identifier
So the namespace also has to comply with the rules for Java Language
Identifiers which do not permit the use of '-'.
Tomcat's EL processing has been made gradually more specification compliant as
bugs have been raised that highlight various issues caused by a relaxed
interpretation of the specification. I suspect the change between 6.0.18 and
6.0.29 was as a result of one of these.
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