Need help with 'Disposition'

[T J]

File: 
sfx2/source/dialog.poLocations:dinfdlg.src#SFX_CB_PROPERTY_NAME.6.stringlist.text
I've a dumb trouble translating "Disposition". It's in Writer > File > 
Properties > Custom Properties > Add > Column Name's  dropdown list. Could 
someone please explain what the property means?