Combination of F2c¯c from DIS measurements at HERA

The charm contribution F2c¯c to the proton structure F2 is determined by the HERA Heavy 
Flavour Group. The results of the D-meson production cross-section measurements are 
combined with the measurements using semi-leptonic decays into muons as well as the 
inclusive track measurements. The correlations of the systematic uncertainties between 
different measurements are taken into account. The data cover the kinematic range of 
photon virtuality 2 < Q2 < 1000 GeV 2 and Bjorken scaling variable 10?5 < x < 10?1.