protected void prepareAttributes(ContextAtExist context) throws XPathException {
XSLExpression exec = getExpressionInstance(context);
NamedNodeMap attrs = getAttributes();
for (int i = 0; i < attrs.getLength(); i++)
exec.prepareAttribute(context, (Attr)attrs.item(i));
}
protected void preprocess(ContextAtExist context) throws XPathException {
// XSLPathExpr exec = getExpressionInstance();