EOS Daughter Chains and Sister Chains (Side chains)

Thank you EOS Apologist. One more time you deserve. Your explanation on Daughter chains and Sister chains is very accurate. And the categorization made by Thomas B. Cox of EOS Alliance is relevant. Currently what is very important for the community if I take as example EOS Nation block producer and also at the heart of the governance and after last poll is the subject "Referendum System" that will regulate the governance on the EOS MainNet Blockchain and give availability to vote on the constitution's article via web toolkit easily as to vote for a block producer.