  A unique, essentially complete sample of 22 QSOs, with high quality soft
X-ray spectra from ROSAT, as well as HST and optical spectrophotometry from
below Ly-alpha to above H-alpha, is being used to investigate the relationships
among the ionizing continuum and the optical and UV continuum, emission and
absorption lines. Here we present a first analysis showing that optical
`Eigenvector 1' linking steeper soft X-ray spectra with increasing optical Fe
II strength, decreasing [O III] 5007 emission, and narrower BLR H-beta
emission, extends to the UV emission lines, and is manifested by weaker C IV
1549 emission, stronger Si III] 1892/C III] 1909 ratio, and narrower C III]
1909 emission. Steeper soft X-ray spectra have been linked to higher L/L_Edd
ratios, thus apparently linking BLR densities, high and low ionization gas, and
kinematics, to the accretion process.
