title: XSLT for each letter in a string
body: <p>I'm writing an XSLT transformation (for XSL-FO), and need to repeat something for each letter in a string value, for example:</p>
  
  <p>If string is stored in <code>MyData/MyValue</code> string (e.g. MyData.MyValue = "something"), I need an for-each like this one:</p>
  
  <pre><code>&lt;xsl:for-each select="MyData/MyValue"&gt; &lt;!-- What goes here to iterate through letters? --&gt;
    &lt;someTags&gt;
      &lt;xsl:value-of select="Letter" /&gt; &lt;!-- What goes here to output current letter? --&gt;
    &lt;/someTags&gt;
  &lt;/xsl:for-each&gt;
  </code></pre>
  
  <p>Any ideas?</p>