Hi,

At the stage of implementing the interface for a new RubyGem. The main
goal is to make something that is intuitive, easy to use. Its a library
for manipulating apple plists. So really we are just manipulating a
file, BUT its of a certain type and predifined structure.

The current feature set includes:

* Read, write, and edit (modify-in-place)
* Can remember operations, but act later (passing in a block), then
calling 'finalize', 'close' or something when the work is to be done.
* Different *types* of plist. Like we can restrict our valid data if our
Plist is for Launchd, or an Appbundle's Info.plist
* Whether binary or xml can be autodetected on read. But want to provide
an option to specify how to write. I don't really know if that should be
a seperate class, method, or just an optional parameter?
* Maybe a couple of global options (or not!) Like whether to override /
enable the subtypes (Info,Launchd) and their validation. Another
possible option is to allow users to override the default backend and
specify their own "backend" to use.
* Have already decided / implemented for users to manipulate their plist
data through the familiar ruby block syntax. eg `plist do
setter_methods.. end`. So im not going to change that part.

This exercise is more about avoiding confusion and providing the neatest
possible interface. In previous work, i have never felt completely
comfortable passing hashes to the initializer for options. Its just
something im not very experienced at doing. But that, or anything else
to make life easier for my users.

Guessing that some of you might yawn and think "ive seen this all before
somewhere else". Well its exactly you guys i need to talk to!
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