What's the difference between "bundle display name" and "bundle name" in cocoa application's info plist

Here is a good question:

Bundle Name, Executable Name, Product Name...anything else?

but I just wonder about the difference between "bundle display name" and "bundle name" in cocoa application's info plist.

I don't think any of the other answers concisely answers the question.

• CFBundleDisplayName - displayed: below icon. According to docs, should be localized, but only if the app itself is localized, otherwise there will be some kind of penalty (if this is true in reality I cannot say)

• CFBundleName - displayed: I have no idea. Docs suggest that it will be used in lists thus recommended max 16 characters, but for instance the Settings→General→Usage list of apps uses CFBundleDisplayName really. To date I have never figured out where exactly this one is used.

Oh, this is for iOS apps, can't speak for other OSes.

thanks for Wevah's answer. here is the descriptions for people who confused with this two constants.

CFBundleDisplayName

CFBundleDisplayName (String - iOS, Mac OS X) specifies the display name of the bundle. If you support localized names for your bundle, include this key in both your information property list file and in the InfoPlist.strings files of your language subdirectories. If you localize this key, you should also include a localized version of the CFBundleName key.

If you do not intend to localize your bundle, do not include this key in your Info.plist file. Inclusion of this key does not affect the display of the bundle name but does incur a performance penalty to search for localized versions of this key.

Before displaying a localized name for your bundle, the Finder compares the value of this key against the actual name of your bundle in the file system. If the two names match, the Finder proceeds to display the localized name from the appropriate InfoPlist.strings file of your bundle. If the names do not match, the Finder displays the file-system name.

For more information about display names in Mac OS X, see File System Overview.

CFBundleName

CFBundleName (String - iOS, Mac OS X) identifies the short name of the bundle. This name should be less than 16 characters long and be suitable for displaying in the menu bar and the application’s Info window. You can include this key in the InfoPlist.strings file of an appropriate .lproj subdirectory to provide localized values for it. If you localize this key, you should also include the key CFBundleDisplayName.