Filter implementation of Functions MAX & MIN

[Miguel-Angel Manso]

Hi,

My working group are thinking about how can one independent application that
use WFS, WMS SLD and Filter encoding, create SLD to define Styles in similar
manner that GIS desktop software do it.
If one user need define regular intervals from one feature attribute,
application need known Max & Min values of attribute.
We have revised filter encoding specification (OGC) and this operation are
enumerated as possible, but no open Source WFS implementation include.

Regards,