XML dump format
Geocrawler takes one option: timestamp. This is the argument that should be passed to update.pike on the next query, to retrieve only the latest changes.
Updated takes no options. It holds a collection of site elements listing the sites that are new or updated since the requested timestamp, or the epoch.
Deleted takes no options. It holds a collection of site elements listing the sites that have been deleted since the requested timestamp.
Site takes a number of options. Each instance of this element represents one site from the database.