what is the 'en' under those XIB files in XCode ?

Question

Hi, I'm looking at a sample code from Apple; named 'iPhoneCoreDataRecipes' and found those 'en' files under DetailHeaderView.xib, RecipeAddView.xib and InstructionsView.xib.

Wondering what are they and their purpose.

Why just make one DetailHeaderView.xib file without the 'en' file?

please find the capture screen shot from the link below: http://i.imgur.com/Wulc1.png

Answer 1

It is for localization. 'en' means English. You could have other files for other languages.