ONCat is a web tool that allows you to browse through the archived data.
To access ONCat, go to https://oncat.ornl.gov/#/
By clicking the Thumbnails button, you can get a preview of every single file archived.
From the top page of your IPTS, click the Files button at the top.
A predefined list of metadata is display in the table.
But if you want to preview the entire list of metadata in your files, click your file name in the left column of this table and navigate through the tree shown.