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="CMOS_e_OpenCollector_schemi.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="BCP_example_01.png" timestamp="2018-09-25T09:26:06Z" url="http://wiki.aino.it/images/a/a7/BCP_example_01.png" descriptionurl="http://wiki.aino.it/index.php?title=File:BCP_example_01.png" ns="6" title="File:BCP example 01.png" />
      <img name="BCP_example_02.png" timestamp="2018-09-25T09:34:12Z" url="http://wiki.aino.it/images/4/48/BCP_example_02.png" descriptionurl="http://wiki.aino.it/index.php?title=File:BCP_example_02.png" ns="6" title="File:BCP example 02.png" />
      <img name="BCP_example_03.png" timestamp="2018-09-25T09:37:04Z" url="http://wiki.aino.it/images/0/0b/BCP_example_03.png" descriptionurl="http://wiki.aino.it/index.php?title=File:BCP_example_03.png" ns="6" title="File:BCP example 03.png" />
      <img name="BCP_help_usage.png" timestamp="2020-10-07T09:22:06Z" url="http://wiki.aino.it/images/e/ec/BCP_help_usage.png" descriptionurl="http://wiki.aino.it/index.php?title=File:BCP_help_usage.png" ns="6" title="File:BCP help usage.png" />
      <img name="CLR_Assembly_01.png" timestamp="2022-02-24T10:34:57Z" url="http://wiki.aino.it/images/8/85/CLR_Assembly_01.png" descriptionurl="http://wiki.aino.it/index.php?title=File:CLR_Assembly_01.png" ns="6" title="File:CLR Assembly 01.png" />
      <img name="CLR_Assembly_03.png" timestamp="2022-02-24T11:06:10Z" url="http://wiki.aino.it/images/d/d3/CLR_Assembly_03.png" descriptionurl="http://wiki.aino.it/index.php?title=File:CLR_Assembly_03.png" ns="6" title="File:CLR Assembly 03.png" />
      <img name="CLR_Assembly_04.png" timestamp="2022-02-24T14:25:11Z" url="http://wiki.aino.it/images/2/25/CLR_Assembly_04.png" descriptionurl="http://wiki.aino.it/index.php?title=File:CLR_Assembly_04.png" ns="6" title="File:CLR Assembly 04.png" />
      <img name="CLR_Assembly_05.png" timestamp="2022-02-24T14:53:33Z" url="http://wiki.aino.it/images/9/9f/CLR_Assembly_05.png" descriptionurl="http://wiki.aino.it/index.php?title=File:CLR_Assembly_05.png" ns="6" title="File:CLR Assembly 05.png" />
      <img name="CLR_Assembly_06.png" timestamp="2022-02-24T14:47:29Z" url="http://wiki.aino.it/images/f/f3/CLR_Assembly_06.png" descriptionurl="http://wiki.aino.it/index.php?title=File:CLR_Assembly_06.png" ns="6" title="File:CLR Assembly 06.png" />
      <img name="CLR_Assembly_07.png" timestamp="2022-02-24T14:58:12Z" url="http://wiki.aino.it/images/1/1d/CLR_Assembly_07.png" descriptionurl="http://wiki.aino.it/index.php?title=File:CLR_Assembly_07.png" ns="6" title="File:CLR Assembly 07.png" />
    </allimages>
  </query>
</api>