Match the string against the token at the given index value. When a token is an attribute name or starting tag, qualified name is what gets matched against This method has to take care of the underlying encoding conversion as well as entity reference comparison
When if the underlying byte
/// content contains various errors. Notice that we are being conservative in making little assumption on
/// the correctness of underlying byte content. This is because the VTD can be generated by another
/// machine such as a load-balancer.
///