magic $flags and $expiration vars show up in view but not doc

i noticed that if you query a view that emits the document, you get properties like $flag and $expiration, but if you query the http interface for the document url itself, it only shows _rev and _id, not any of the dollar sign magic variables. is there a reason behind that difference?

curl "http://192.168.96.128:8092/default/_design/test/_view/all?key=%22test%2Fquery-1324052106.5247-11152826%22"
{"total_rows":39,"rows":[
{"id":"test/query-1324052106.5247-11152826","key":"test/query-1324052106.5247-11152826","value":{"_id":"test/query-1324052106.5247-11152826","_rev":"1-00009fddf9213ed70000000d00000000","$flags":0,"$expiration":1324055706,"foo":"bar"}}
]}

curl "http://192.168.96.128:8092/default/test%2Fquery-1324052106.5247-11152826"
{"_id":"test/query-1324052106.5247-11152826","_rev":"1-00009fddf9213ed70000000d00000000","foo":"bar"}