interface, where do I put them, what do I call them, how do I load them?

[eluser]jared4444[/eluser]
Hi,
I am new to CI. I want to have my class implement an interface.

Where do I put this?
Do I have to call it something like MY_?
How do I load it?
What do I call it? (If I have to call the file MY_, do I have to call the interface MY_?

Thanks

[eluser]2think[/eluser]
Hi jared4444,

It isnt necessarily about interfaces but wondering if your solution set is a good fit for a library? http://ellislab.com/codeigniter/user-gui...aries.html