<code>:not(p)</code>

<code>div:not(.abc)</code> 

<article>
    <h1>The CSS :not Selector Demo</h1>
    <p>Jujubes applicake sesame snaps chupa chups <a href="http://www.thisisnotwikipedia.com/">chocolate cake</a>. Oat cake marshmallow wypas toffee donut cake. Chupa chups jelly cupcake gummi bears. Lemon drops cake wafer.</p>
    <p><a href="http://en.wikipedia.org/wiki/Cheesecake">Cheesecake chocolate cake donut</a> jelly sweet roll powder soufflé chocolate cake. Wypas cotton candy lemon drops cookie candy donut bonbon marzipan. Macaroon candy liquorice jelly-o. Chocolate pie sweet roll candy <a href="http://en.wikipedia.org/wiki/Marshmallow">marshmallow</a> dragée cotton candy brownie marshmallow.</p>
    <p>Pudding topping marshmallow bear claw. Pie muffin pastry gummies <a href="http://www.exampledomain.com">fruitcake brownie</a> jelly gingerbread sesame snaps. Candy pudding cupcake bear claw. Carrot cake muffin cotton candy tootsie roll muffin. Jelly beans tart dragée sweet icing <a href="http://en.wikipedia.org/wiki/Chocolate_bar">wafer topping chocolate bar</a>. Sweet roll toffee sugar plum pastry dragée <a href="http://www.somename.co/">bonbon candy muffin</a>.</p>
    <p><a href="http://en.wikipedia.org/wiki/Pastry">Cake marzipan applicake pastry</a> wypas fruitcake. Oat cake chocolate wypas dragée sugar plum carrot cake icing. Caramels chocolate bar croissant wafer cupcake pie jujubes chocolate bar. Biscuit candy canes dragée.Candy brownie oat cake sesame snaps cheesecake powder tootsie roll biscuit bear claw. Soufflé gummi bears jelly beans sesame snaps faworki <a href="http://en.wikipedia.org/wiki/Dessert">cookie dessert sweet bonbon</a>.</p>
</article>

a:after {
        display: inline-block;
    }

a:not([href^="http://en.wikipedia.org/"]):after {
   background-color: #F8EEBD;
   border: 1px solid #EEC56D;
   border-radius: 3px 3px 3px 3px;
   color: #B0811E;
   content: "!";
   font-size: 10pt;
   margin-left: 5px;
   padding: 1px 6px;
   position: relative;
}