Combining FeatureSets exists in core Pychrm for Continuous FeatureSets, but does not Discrete FeatureSets, which is all that is currently implemented in OMERO.WND-CHARM. Discrete FeatureSet combination IS, however, on the cusp of being ready (unittests have been written and it is mostly coded up). This is definitely an issue to let slide until the next release, but we shouldn't lose sight of it.
Combining FeatureSets exists in core Pychrm for Continuous FeatureSets, but does not Discrete FeatureSets, which is all that is currently implemented in OMERO.WND-CHARM. Discrete FeatureSet combination IS, however, on the cusp of being ready (unittests have been written and it is mostly coded up). This is definitely an issue to let slide until the next release, but we shouldn't lose sight of it.