What is xmlns in XAML file?

Answer

“xmlns” stands for XML namespaces. It helps us to avoid name conflicts and confusion in XML documents. For example consider the below two XML which have table elements, one table is a HTML table and the other represents a restaurant table. Now if both these elements come in a single XML document there would name conflicts and confusion.

 <table>
<tr><td>Row1</td></tr>
<tr><td>Row2</td></tr>
</table>

===============================

<table>
<cloth>red</cloth>
<serve>Tea</serve>
</table>

So to avoid the same we can use XML namespaces. You can see in the below XML we have qualified the HTML table with “” and the restaurant table element qualified with “”.

<h:table xmlns:h="http://www.w3.org/TR/html4/">
<tr><td>Row1</td></tr>
<tr><td>Row2</td></tr>
</h:table>

================================

<r:table xmlns:h="http://www.questpond.com/restaurant/table/def">
<cloth>red</cloth>
<serve>Tea</serve>
</r:table>