auto_props and setting the same property multiple times?

[Dirk]

Hi,

I changed my local auto_props code to maintain a hash of properties. I 
did this in order to force uniqueness on the properties. Now I came 
across the following situation:

a bitmap file is binary and will get the mime-type: 
"svn:mime-type=application/octet-stream"
from the auto_props it will get "svn:mime-type=image/bmp".

Can both settings exists at the same time?
Must both settings be set in order to treat the file as binary?
How is the list of properties assigned? Separated by semicolon or multiline?
Are some properties defined to be unique and others not? E.g. the 
"svn:executable" does not have a value.

best regards
Dirk