DFF_Prop_xyz vs. ESCHER_Prop_xyz ?

[Regina Henschel]

Hi all,

why there are both the defines DFF_Prop_xyz in msdffdef.hxx and the 
defines ESCHER_Prop_xyz in escherex.hxx ?
Both seems to be mainly based on the PIDs in Microsoft Office Drawing 
97-2007 Binary Format Specification.

Kind regards,
Regina