Bip39 or slip39 https://www.4shared.com/s/fAf7kF4dLku Though it takes advantage of BIP32 process it is possible to still import BIP39 seeds into Electrum wallet. Also besides BIp32 There may be BIP44 Edition which some wallet use with the technology of seeds. Vault12 will be the pioneer in copyright inheritance administration. Check out https://ragingbookmarks.com/story20134562/bip-39-pdf-5-essential-elements-for-bip39-word-list-pdf-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw