Filter ext_community?

I have a number of routes that include non-standard bgp_ext_community entries, for example unknown 0x10b (VRF Route Import). Is there a way to filter bgp_ext_community for only route targets? I tried the following, but the ec datatype expects integers, not wildcards: show route filter { if (rt, *, *) ~ bgp_ext_community then accept; reject; } all I'm using bird 2.0.2. Thanks! -- Chris Herdt