You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <pageswithprop pwpcontinue="179" />
  </query-continue>
  <query>
    <pageswithprop>
      <page pageid="1" ns="0" title="Home" value="&lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
      <page pageid="147" ns="0" title="Rock/download" value="Rock Download&lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
      <page pageid="152" ns="0" title="Rock/specifications" value="&lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
      <page pageid="155" ns="0" title="Rock2" value="Radxa Rock2 Series&lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
      <page pageid="157" ns="0" title="News/2014/9/New wiki skin powered by bootstrapskin" value="&lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
      <page pageid="163" ns="0" title="Rock/features" value="&lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
      <page pageid="164" ns="0" title="Rock/gallery" value="&lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
      <page pageid="165" ns="0" title="About" value="About &lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
      <page pageid="166" ns="0" title="Rock/specification" value="&lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
      <page pageid="167" ns="10" title="Template:News topic" value="&lt;span style=&quot;display: none&quot;&gt;&lt;/span&gt;" />
    </pageswithprop>
  </query>
</api>