The Milky Way halo as a QSO absorption-line system - New results from an HST/STIS absorption-line catalogue of Galactic high-velocity cloudsP. Herenz, P. Richter, J. C. Charlton and J. R. MasieroA&A, 550 (2013) A87DOI: https://doi.org/10.1051/0004-6361/201220531