#ifndef WeightMatrixTag_H
#define WeightMatrixTag_H

/**
   * Tag to apply to class GlobalErrorBase to give it the meaning of a 
   * weight matrix (i.e. the inverse of the covariance matrix).
   * A typedef to a  GlobalErrorBase object defined as a weight is 
   * available in GlobalWeight
   */

class WeightMatrixTag {};

#endif
