Hi all, when editing gco:Boolean in GeoNetwork we don't have any
specific form control. Here is a patch to add a combobox with null,
true, false options for all gco:Boolean elements. Checkbox could not be
use because valid values for xsi:boolean are 0, 1, true, false and null.
I'm using it mainly for data quality, conformance result option to set
if test was valid/failed or not pass (null).
If this is useful, I could apply the patch.