I am looking to design a custom File System Library (really, a file system 
library that will sit above VFAT and pass it cyphertext to facilitate 
encryption). I see it is implemented by creating a shared library, with a type 
of 'libr'. 

In the Expansion section of the Palm OS Companion 
(http://www.palmos.com/dev/support/docs/palmos/ExpAndVFSConcepts.html) it says:
------------

File Systems

The Palm OS expansion architecture defines a common interface for all file 
system implementations on the Palm OS. This interface consists of a complete 
set of APIs for interacting with the file system, including the ability to 
open, close, read, write, and delete both files and directories on named 
volumes.

File system implementations are packaged as shared libraries of type 
sysFileTFileSystem ('libf'). They are modular plug-ins that add support for a 
particular type of file system, such as VFAT, HFS, or NFS. 

-----------

Where is the specification for the "complete set of APIs" that the File System 
Library is to implement? I have been looking for this specification and can't 
find it anywhere. 

Any help would be greatly appreciated

Nathan
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