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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20140903121331" timestamp="2014-09-03T12:13:31Z" ns="0" title="Библиотеки" />
        <page value="20140903121331" timestamp="2014-09-03T12:13:31Z" ns="0" title="Индексация контекстов" />
        <page value="20140903121331" timestamp="2014-09-03T12:13:31Z" ns="0" title="Компонент" />
        <page value="20140903121331" timestamp="2014-09-03T12:13:31Z" ns="0" title="Компонентный анализ" />
        <page value="20140903121331" timestamp="2014-09-03T12:13:31Z" ns="0" title="Лексема" />
        <page value="20140903121331" timestamp="2014-09-03T12:13:31Z" ns="0" title="Поле" />
        <page value="20140903121331" timestamp="2014-09-03T12:13:31Z" ns="0" title="Семантический граф" />
        <page value="20140903121331" timestamp="2014-09-03T12:13:31Z" ns="0" title="Проект" />
        <page value="20140903121331" timestamp="2014-09-03T12:13:31Z" ns="0" title="Система прав" />
        <page value="20151015141820" timestamp="2015-10-15T14:18:20Z" ns="0" title="Новости" />
      </results>
    </querypage>
  </query>
</api>