Filters
Filters can be applied to both listeners and browsers, and also be used to evaluate a tuple against a filter. Filters allow your application to further refine the set of tuples it wants to work with using a space browser or event listener.
A filter string can be seen as what would follow the where clause in a select * from Space where… statement.
Examples
field1 < (field2+field3)state = "CA"name LIKE ".*John.*" //any name with John
Filters can make reference to any of the fields contained in the tuples. Filters do not provide any ordering or sorting of the entries stored in the space.