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="20150321013104|20150320_DocumentProvenance-MWTb.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="20150320_DocumentProvenance-MWTc.png" timestamp="2015-06-27T01:37:53Z" user="Mimi" url="https://www.organicdatascience.org/gpf/images/8/85/20150320_DocumentProvenance-MWTc.png" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:20150320_DocumentProvenance-MWTc.png" ns="6" title="File:20150320 DocumentProvenance-MWTc.png" />
      <img name="Checklist.xlsx" timestamp="2015-06-19T06:38:05Z" user="Yolanda" url="https://www.organicdatascience.org/gpf/images/6/60/Checklist.xlsx" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:Checklist.xlsx" ns="6" title="File:Checklist.xlsx" />
      <img name="Checklist.jpg" timestamp="2015-06-19T06:31:48Z" user="Yolanda" url="https://www.organicdatascience.org/gpf/images/0/04/Checklist.jpg" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:Checklist.jpg" ns="6" title="File:Checklist.jpg" />
      <img name="Variable_Info_Example.zip" timestamp="2015-06-18T01:16:14Z" user="Scott" url="https://www.organicdatascience.org/gpf/images/1/10/Variable_Info_Example.zip" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:Variable_Info_Example.zip" ns="6" title="File:Variable Info Example.zip" />
      <img name="Workflow_2.png" timestamp="2015-05-12T17:45:27Z" user="Demir" url="https://www.organicdatascience.org/gpf/images/c/c1/Workflow_2.png" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:Workflow_2.png" ns="6" title="File:Workflow 2.png" />
      <img name="Workflow_1.png" timestamp="2015-05-12T17:44:43Z" user="Demir" url="https://www.organicdatascience.org/gpf/images/9/9d/Workflow_1.png" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:Workflow_1.png" ns="6" title="File:Workflow 1.png" />
      <img name="PIHMworkflow.png" timestamp="2015-05-12T12:09:15Z" user="Xuan" url="https://www.organicdatascience.org/gpf/images/7/77/PIHMworkflow.png" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:PIHMworkflow.png" ns="6" title="File:PIHMworkflow.png" />
      <img name="PIHMworkflowwings.png" timestamp="2015-04-05T05:01:01Z" user="Xuan" url="https://www.organicdatascience.org/gpf/images/9/97/PIHMworkflowwings.png" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:PIHMworkflowwings.png" ns="6" title="File:PIHMworkflowwings.png" />
      <img name="2015-04-02_SJRMetabolism_Workflow.png" timestamp="2015-04-02T23:02:15Z" user="Sandra" url="https://www.organicdatascience.org/gpf/images/5/58/2015-04-02_SJRMetabolism_Workflow.png" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:2015-04-02_SJRMetabolism_Workflow.png" ns="6" title="File:2015-04-02 SJRMetabolism Workflow.png" />
      <img name="Workflow_sketch_Mar27.png" timestamp="2015-03-27T18:55:46Z" user="Lee" url="https://www.organicdatascience.org/gpf/images/0/0c/Workflow_sketch_Mar27.png" descriptionurl="https://www.organicdatascience.org/gpf/index.php?title=File:Workflow_sketch_Mar27.png" ns="6" title="File:Workflow sketch Mar27.png" />
    </allimages>
  </query>
</api>