How can I get variable content from a meta tag?

Question

With XSLT I want generate the html code to a web page that can obtain from the xml design

I have this

<?xml version="1.0" encoding="ISO-8859-1"?>
<tagMeta>
  <metaKey>
    <keyContent>
        How to dynamically insert META Tag in an HTML document
    <keyContent>
  <metaKey>
<tagMeta> 

And I want to getting

<meta name="keywords" content="I don't know whats going here to put the keyContent"/>