enriched image information in pasteboard in Graphos

[Riccardo Mottola]

Hi,

I am in the need of copying an image in Graphos through the copy/paste 
mechanism.

Objects in graphos get copied with a specific pasteboard type as plist,. 
The same plist is also used to save to a file.

The plist contains objects where you have e.g. positions and sizes. The 
properties are "serialized" manually, so a NSPoint is actually split in 
x, y in a human readable form.

If I want to copy an image, I need to provide both the data (e.g. 
TIFFRepresentation as NSData) but also the accessory information I need.
How can I put NSData in a property list? can I serialize it in a clever 
way? I suppos some kind of 7bit encoding needs to happen, a bit like 
hex64 for mail attachments.

Riccardo