Google Search Appliance Protocol Reference - Manual (Page 51)

Google Search Appliance: Search Protocol Reference Request Format 51
Example 4. The following is an open-ended date range search request that returns results containing
“date” meta tag values later than 2007-01-01:
Monica inmeta:date:daterange:2007-01-01..
Date meta tags must contain only the date information. If you want to filter by date meta tags, make
sure the meta tag content fields do not contain any information other than a date.
Limitations
For information about search request limitations, see Specifications and Usage Limits .