This separate package of older Xspec model data is unnecessary for most users. It contains the following files:

spectral/modelData/APEC_nei_v11_comp.fits
spectral/modelData/APEC_nei_v11_line.fits
spectral/modelData/apec_v1.10_coco.fits
spectral/modelData/apec_v1.10_line.fits
spectral/modelData/apec_v1.2.0_coco.fits
spectral/modelData/apec_v1.2.0_line.fits
spectral/modelData/apec_v1.3.1_coco.fits
spectral/modelData/apec_v1.3.1_line.fits
spectral/modelData/apec_v2.0.1_coco.fits
spectral/modelData/apec_v2.0.1_line.fits
spectral/modelData/apec_v2.0.2_coco.fits
spectral/modelData/apec_v2.0.2_line.fits
spectral/modelData/apec_v3.0.2_coco.fits
spectral/modelData/apec_v3.0.2_line.fits
spectral/modelData/apec_v3.0.2_nei_comp.fits
spectral/modelData/apec_v3.0.2_nei_line.fits
spectral/modelData/apec_v3.0.3_coco.fits
spectral/modelData/apec_v3.0.3_line.fits
spectral/modelData/apec_v3.0.3_nei_comp.fits
spectral/modelData/apec_v3.0.3_nei_line.fits
spectral/modelData/apec_v3.0.7_coco.fits
spectral/modelData/apec_v3.0.7_line.fits
spectral/modelData/apec_v3.0.7_nei_comp.fits
spectral/modelData/apec_v3.0.7_nei_line.fits
spectral/modelData/apec_v3.0.9_51_coco.fits
spectral/modelData/apec_v3.0.9_51_line.fits
spectral/modelData/apec_v3.0.9_coco.fits
spectral/modelData/apec_v3.0.9_ionbal.fits
spectral/modelData/apec_v3.0.9_line.fits
spectral/modelData/apec_v3.0.9_nei_comp.fits
spectral/modelData/apec_v3.0.9_nei_line.fits
spectral/modelData/apec_v3.0_eigen.fits
spectral/modelData/apec_v3.0_nei_comp.fits
spectral/modelData/apec_v3.0_nei_line.fits
spectral/modelData/eigen.fits
spectral/modelData/eigen0502.fits
spectral/modelData/spex_v3.07_coco.fits
spectral/modelData/spex_v3.07_line.fits