On May 25, 2014, at 8:05 AM, Koen van der Drift <koenvanderdr...@gmail.com> 
wrote:

> However, I noticed that strings that have the form P12345 also turn blue.  
> Any idea why that string would turn into an NSURL?  The url scheme is nil, 
> and the path components just show P12345.  

It’s a relative URL — just a single path component, that could be appended to 
an absolute URL.

Trying to recognize plausible URLs is harder than it seems at first glance. I 
have some boilerplate code that checks whether the scheme is non-nil and longer 
than one character. If you really want to do it correctly, I think Data 
Detectors has API for it.

—Jens
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