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    <p>It's not even possible to build a custom data detector on anything but iOS 4. <a href="http://developer.apple.com/library/ios/#documentation/Foundation/Reference/NSDataDetector_Class/Reference/Reference.html" rel="nofollow">NSDataDetector</a> is only available on iOS 4 and above. </p> <p>If they existed on OS X and were a plug-in class like Spotlight importers, that'd be a nice feature. Perhaps filing a request at <a href="http://bugreport.apple.com" rel="nofollow">bugreport.apple.com</a> would help it along?</p> <p><strong>Later update</strong></p> <p>I think the reason this hasn't been opened up with an API is because they're only meant to find common data (contact info, dates, URLs) for which there is only one (or just a few) uses. That is, contact info can be stored or used in "the" system-designated app. URLs can be auto-highlighted so they're linkable (clicks invoke the system-designated handler - Safari, an app registered to a protocol, etc.). But there's only one direction to funnel those actions and the endpoint is always a major "convenience app" meant to manage this common information (contacts, calendar, browser, email app, phone app...)</p> <p>On the other hand, consider app-specific information. Data formatted a certain way for use with one app or platform might mean something else entirely to another application. In fact, this is rather common. So what happens when a string like <code>%%SOMESTRING%%</code> is detected? To one app, it might be a placeholder token. To another, it might be a user name. To another still, it might be interpreted as <code>%%USERNAME</code> followed by <code>%%</code>. Suddenly the simple system-wide UI for handling basic data types has to account for multiple actions and/or multiple "data detector plugins" claiming all or part of a format. </p> <p>I'm not sure we'll ever see custom data detector APIs on iOS or Mac for this reason alone.</p>
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    1. POIs it possible to add custom Data Detectors to OSX Cocoa applications? (such as Mail.app / Safari)
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    1. USJoshua Nozzi
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    1. POIs it possible to add custom Data Detectors to OSX Cocoa applications? (such as Mail.app / Safari)
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    1. COThanks for that Joshua. It seems a shame. I can think of many uses!
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    2. COSnow Leopard actually does have data detectors, but AFAIK there's no SPI for writing one. Judging by Apple's history, I would bet NSDataDetector is available in Lion.
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    3. COSure, it has them. I only meant we can't build them. :-)
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