title: Guaranty the uniqueness of URL schemes (CFBundleURLSchemes) entries for iPhone applications
body: <p>I'd like to know if (and how) Apple guaranty the uniqueness of CFBundleURLSchemes entries for iPhone applications. </p>
  
  <p>In the Apple documentation (http://developer.apple.com/library/ios/#documentation/iphone/conceptual/iphoneosprogrammingguide/StandardBehaviors/StandardBehaviors.html) section "Implementing custom URL Schemes") they say that about CFBundleURLName "To ensure uniqueness, it is recommended that you specify a reverse-DNS style of identifier", but nothing about CFBundleURLScheme. And when an application launches another application using an URL scheme, there is no reference to BundleURLName, it just refer to URL scheme. (method "- (BOOL)openURL:(NSURL *)url" of UIApplication).</p>
  
  <p>So if I publish an application responding to a particular URL scheme on the app store, can I be sure that no other application responds to this URL scheme ? Is it a part of the Apple validation process ? </p>
  
  <p>I have not be able to find any documentation about that neither on the Apple site nor on any other site.</p>