title: concatenation two fields in xsl
body: <p>I have a some xml fields i need to concatenate all the fields in one field</p>
  
  <pre><code>&lt;fields&gt;
  &lt;field name="first"&gt;&lt;value&gt;example&lt;/value&gt;&lt;/field&gt;
  &lt;field name="last"&gt;&lt;value&gt;hello&lt;/value&gt;&lt;/field&gt;
  &lt;field name="age"&gt;&lt;value&gt;25&lt;/value&gt;&lt;/field&gt;
  &lt;field name="enable"&gt;&lt;value&gt;1&lt;/value&gt;&lt;/field&gt;
  &lt;fields&gt;
  </code></pre>
  
  <p>i need to transform as following </p>
  
  <pre><code>&lt;fields&gt;
  &lt;field name="all"&gt;&lt;value&gt;example hello 25 1&lt;/value&gt;&lt;/field&gt;
  &lt;/field&gt;
  </code></pre>
  
  <p>with space delimiter using XSL </p>