public Variable resolveVariable(QName qname) throws XPathException {
		VariableDeclaration decl = (VariableDeclaration)mGlobalVariables.get(qname);
		if(decl != null && !mStaticVariables.containsKey(qname)) {
            decl.eval(null);
		}
		return (Variable) mStaticVariables.get(qname);
	}