The root element of an update description. It contains the update instructions for managed things after thing-type changes. Instructions are grouped by thing-type and (internal) version. Update a channel (e.g. change channel-type, label, description). By default, the old configuration and tags are copied to the new channel. If set, already existing tags are overwritten. Remove a channel from a thing. The simple id of the channel (i.e. without the thing UID). A comma-separated list of channel-group-ids. The fully qualified UID of the channel type (e.g. "system:color", "viessmann:lastErrorMessage"). The fully qualified UID of the thing type.