$currentDate(DOCUMENT)
$inc(DOCUMENT)
$min(DOCUMENT)
$max(DOCUMENT)
$mul(DOCUMENT)
$rename(DOCUMENT)
$set(DOCUMENT)
$setOnInsert(DOCUMENT)
$unset(DOCUMENT)
$addToSet(UPDATE)
$pop(DOCUMENT)
$pull(DOCUMENT)
$push(UPDATE)
$putAll(DOCUMENT)