Block top - The block selection and length from 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 in fact be the one hundred and first transaction https://dmozbookmark.com/story20277581/a-review-of-blockchain-explorer-xrp-https-pad-fs-lmu-de-h2fzbno0rjqfpyic-69lxg