An important aspect of high- superconductor research is the connection between the hole concentration in the - bands, the Cu valence, and the of the material. In the high- superconductors, the Cu(2) bond valence sum has been shown  to have the same shape versus as , while the bond valence sum of the Cu(1) chain atoms has a linear dependence on oxygen content and is independent of the material's superconductivity. Polarized XANES measurements have been very useful in studies of new high- materials. For example, the 3d valence electronic configuration of the Cu atoms in was determined by comparing the XANES features of to XANES fingerprints of closely related Cu-O compounds . Since DANES methods provide precise, and very easy, assignments of near-edge features to specific sites, DANES studies should prove useful in site-specific valence determinations of high- and other materials. In addition, because the tensor properties of the DANES signals are sensitive to the empty orbital symmetries and occupations, there is considerable interest in applying tensor DANES to make site-specific empty orbital maps .