Godzil (./24438) :
Bon le target n'est PAS déprécié :

http://dev.w3.org/html5/markup/a.html

target = browsing-context name or keyword CHANGED #
A name or keyword giving a browsing context for UAs to use when following the hyperlink.The target attribute on the a element was deprecated in a previous version of HTML, but is no longer deprecated, as it useful in Web applications, particularly in combination with the iframe element.

Ceci:

particularly in combination with the iframe element.

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