Document plugin sends empty hashes for unused metadata schemas #382
Description
Example:
...
"dc": {},
"favicon": "http://s2.wp.com/i/favicon.ico?m=1311975824g",
"prism": {},
"highwire": {},
...{{ message }}
Example:
...
"dc": {},
"favicon": "http://s2.wp.com/i/favicon.ico?m=1311975824g",
"prism": {},
"highwire": {},
...