[DFDL-WG] DFDL: mikeb unable to make call this week

Sorry folks, I did work with Steve on nulls/defaults, and that's in to Alan for integration I believe (yes steve?) I also did my work reviewing the expression language draft. I tried to write the calculated elements (inputValueCalc &c) section. Small improvements sent to alan, but there's more to do here still. I need the slides from the last OGF to prepare for the one here in Cambridge MA later in Feb. I am registered now. .mikeb