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Hierarchical model–view–controller
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<p>Hierarchical model–view–controller (HMVC) is a software <a href="/facts/Architectural_pattern/GnN0z06K">architectural pattern</a>, a variation of <a href="/facts/Model%E2%80%93view%E2%80%93controller/vRbMXjMm">model–view–controller</a> (MVC) similar to <a href="/facts/Presentation%E2%80%93abstraction%E2%80%93control/LXK6QX5F">presentation–abstraction–control</a> (PAC), that was published in 2000 in an article in <a href="/facts/JavaWorld/EJ0zA8FV">JavaWorld</a> Magazine. The authors were apparently unaware of PAC, which was published 13 years earlier. </p><p>The controller has some oversight in that it selects first the model and then the view, realizing an approval mechanism by the controller. The model prevents the view from accessing the data source directly. </p>