Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction variety for that from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://myfirstbookmark.com/story20739326/a-review-of-blockchain-explorer-xrp-https-md-darmstadt-ccc-de-znwtrv3frkwon6rj4y8pua