Is there a way to extract the individual files from a composite file, such as the HTML files created by the picard tools?

I would like to take the metrics files and use them further down in some workflow, but I only get an HTML file...

While these HTML files are nice for quickly looking at the results of one or two files, it becomes a problem if you have 88 samples like I do...

I hate to have to re-write all the picard tools to produce actual files, but maybe there is something I am missing about composite datatype files?

The wiki only explains how to CREATE them, not how to use those files downstream....