This page has a link to a manifest05.appcache file which has a
NETWORK: section listing two URLs:
CACHE MANIFEST # 0.0.2v jquery.js NETWORK: api/test01.json api/test02.json
This test is to see if there is in difference in the function of the
NETWORK: section if the URLs are relative to the site and manifest file. The XHR calls pull two local JSON files.