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>
    <allimages aicontinue="Baby_bath.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Baby-165067_1280.jpg" timestamp="2019-01-17T10:40:34Z" url=" /images/4/4b/Baby-165067_1280.jpg" descriptionurl=" /index.php/Ficheiro:Baby-165067_1280.jpg" ns="6" title="Ficheiro:Baby-165067 1280.jpg" />
      <img name="Baby-21167_1920.jpg" timestamp="2016-04-23T14:51:12Z" url=" /images/5/57/Baby-21167_1920.jpg" descriptionurl=" /index.php/Ficheiro:Baby-21167_1920.jpg" ns="6" title="Ficheiro:Baby-21167 1920.jpg" />
      <img name="Baby-215298_1920.jpg" timestamp="2018-12-19T23:37:36Z" url=" /images/f/fe/Baby-215298_1920.jpg" descriptionurl=" /index.php/Ficheiro:Baby-215298_1920.jpg" ns="6" title="Ficheiro:Baby-215298 1920.jpg" />
      <img name="Baby-215867_1280.jpg" timestamp="2018-05-11T09:44:21Z" url=" /images/8/80/Baby-215867_1280.jpg" descriptionurl=" /index.php/Ficheiro:Baby-215867_1280.jpg" ns="6" title="Ficheiro:Baby-215867 1280.jpg" />
      <img name="Baby-3658595_1920.jpg" timestamp="2018-12-19T23:41:09Z" url=" /images/4/43/Baby-3658595_1920.jpg" descriptionurl=" /index.php/Ficheiro:Baby-3658595_1920.jpg" ns="6" title="Ficheiro:Baby-3658595 1920.jpg" />
      <img name="Baby-84686_1920.jpg" timestamp="2016-04-22T21:24:52Z" url=" /images/3/31/Baby-84686_1920.jpg" descriptionurl=" /index.php/Ficheiro:Baby-84686_1920.jpg" ns="6" title="Ficheiro:Baby-84686 1920.jpg" />
      <img name="Baby-crying.jpg" timestamp="2016-08-30T00:07:47Z" url=" /images/1/14/Baby-crying.jpg" descriptionurl=" /index.php/Ficheiro:Baby-crying.jpg" ns="6" title="Ficheiro:Baby-crying.jpg" />
      <img name="Baby-seat-car.jpg" timestamp="2016-08-29T22:55:26Z" url=" /images/8/86/Baby-seat-car.jpg" descriptionurl=" /index.php/Ficheiro:Baby-seat-car.jpg" ns="6" title="Ficheiro:Baby-seat-car.jpg" />
      <img name="Baby-sleeping.jpg" timestamp="2017-11-24T17:52:44Z" url=" /images/0/0b/Baby-sleeping.jpg" descriptionurl=" /index.php/Ficheiro:Baby-sleeping.jpg" ns="6" title="Ficheiro:Baby-sleeping.jpg" />
      <img name="Baby-walker.jpg" timestamp="2020-04-13T23:03:03Z" url=" /images/d/dc/Baby-walker.jpg" descriptionurl=" /index.php/Ficheiro:Baby-walker.jpg" ns="6" title="Ficheiro:Baby-walker.jpg" />
    </allimages>
  </query>
</api>