Any ideas how the Pack... properties work?

[Imadruid]

I undertsand the concepts of PACKing UI objects from Java. I'm just having a hard time wrapping my brain around things like:

PackLocationProp="-027/0001,-001/0001"
PackSize="absolute,absolute"
PackSizeProp="-013/0001,-003/0001"

I can't seem to make sense of those numbers and size values. Most of my modding seems to be working without me ever touching these values.

Does anyone know what they are referring too? Please give me some indication if you are guessing or 100% sure. Thanks.

BTW, is there a manual somewhere (accessible) that lists what all these parameters are? I have searched their site and the install directories, and I haven't come arosss anything that resembles a developer manual.