`ISDOField`
		getVariant
		setVariant
		getBoolean
		setBoolean
		getByte
		setByte
		getBytes
		setBytes
		getCharacter
		setCharacter
		getCurrency
		setCurrency
		getDate
		setDate
		getDouble
		setDouble
		getFloat
		setFloat
		getInteger
		setInteger
		getLong
		setLong
		getShort
		setShort
		getString
		setString
		getDataObject
		setDataObject
		getChangeSummary
		setChangeSummary
		isSet
		unset
		isNull
		setNull