[ALPS-users] Where is the measurements defined in hybridization dmft?

Dear all,

I want to modify the measurement in the hybridization expansion of dmft and I looked through the source code in alps/applications/dmft/qmc and its two subdirectories hybridization/ and interaction_expansion/. In the hybridization/impurity.h, a paragraph of codes looks

// create measurement objects measurements << RealVectorObservable("n"); measurements << RealVectorObservable("order"); measurements << vec_obs_t("Greens"); measurements << vec_obs_t("Greens_4point"); measurements << vec_obs_t("Greens_4point_ud"); measurements << RealObservable("sign"); measurements << RealObservable("MatrixSize");

measurements << RealVectorObservable("overlap");

Where is the 'measurements' defined?