Gary, many thanks. Your advice lead me to UKXattrMetadataStore which works 
perfectly for the small NSDictionary of settings I have.

Thanks again,

Martin

On 28, Aug, 2011, at 04:35 PM, Gary L. Wade wrote:

> Many applications use extended attributes (xattr) for similar purposes. The 
> oldest way that still works is to use the resource fork of a file, which is 
> sometimes implemented as an xattr. In these cases, for those file systems 
> that support them, they are intrinsically part of the same file.
> 
> - Gary L. Wade (Sent from my iPhone)
> 
> On Aug 28, 2011, at 12:42 AM, Martin Hewitson <martin.hewit...@aei.mpg.de> 
> wrote:
> 
>> Dear list,
>> 
>> I've been scratching my head for a while on this. Suppose you have an 
>> NSDocument app like TextEdit which just allows the user to edit a text file. 
>> Now suppose there are some additional state settings associated with the 
>> editor. These could dictate how the contents of the text file are displayed, 
>> or how some other actions are to be carried out. My question is, where is 
>> the best place to store these additional state settings so that they persist 
>> across restarts of the app. I can think of 3 ways, and I don't really like 
>> any of them:
>> 
>> 1) encode the settings as a string and tag it on the end of the text file 
>> then parse that string out when the file is reopened.
>> 2) write an additional plist file next to the text file on disk, perhaps 
>> with the same name or as a hidden file.
>> 3) write a plist file in the application support directory
>> 
>> Thoughts:
>> 
>> Method 1) sounds fragile and painful to implement and maintain
>> Method 2) sounds intrusive - I don't like the idea of sprinkling files on 
>> the user's disk
>> Method 3) would mean the support directory fills with plist files which may 
>> never be used again
>> 
>> Anyone got any better ideas? Perhaps I'm missing something very obvious 
>> here.....
>> 
>> Cheers,
>> 
>> Martin
>> 
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> Martin Hewitson
>> Albert-Einstein-Institut
>> Max-Planck-Institut fuer 
>>   Gravitationsphysik und Universitaet Hannover
>> Callinstr. 38, 30167 Hannover, Germany
>> Tel: +49-511-762-17121, Fax: +49-511-762-5861
>> E-Mail: martin.hewit...@aei.mpg.de
>> WWW: http://www.aei.mpg.de/~hewitson
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Hewitson
Albert-Einstein-Institut
Max-Planck-Institut fuer 
    Gravitationsphysik und Universitaet Hannover
Callinstr. 38, 30167 Hannover, Germany
Tel: +49-511-762-17121, Fax: +49-511-762-5861
E-Mail: martin.hewit...@aei.mpg.de
WWW: http://www.aei.mpg.de/~hewitson
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~





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