Adding Days to defined date on XSLT
<p>im trying to add seven days from my defined day, 
i've a defined date like this </p>

<pre><code>//n1:Invoice/cbc:IssueDate
</code></pre>

<p>i m using date like this and it works</p>

<pre><code>&lt;xsl:value-of select="//n1:Invoice/cbc:IssueDate" /&gt;
</code></pre>

<p>that turns me <code>20-01-2016</code>
and i want to print seven days after this date like:</p>

<pre><code>27-01-2016
</code></pre>

<p>any idea?</p>