eclipse - Undefined attribute name (aria-hidden) -

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i'm using eclipse kepler sr2 (4.3.2). jsp pages, jsp validator reports warning on bootstrap alert box following

<div class="alert alert-danger alert-dismissable">     <button type="button" class="close" data-dismiss="alert" aria-hidden="true">x</button>     error occurred </div>

the closest similar question i've seen why eclipse creates warning on html script tag? i'm assuming latest version of eclipse has html5 support.

is warning valid, or there way go away.

upgraded eclipse luna , warning isn't shown anymore guess solution upgrade luna.


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