Block top - The block number and length in the blockchain (in blocks) on creation of the current block Nonce - The transaction variety with the from address (Remember this starts at 0 so a nonce of 100 would really be the a hundred and first transaction submitted by this https://bookmarklethq.com/story20573456/a-review-of-blockchain-explorer-xrp-https-clancy-olesen-4-mdwrite-net-opening-the-record-your-resource-to-blockchain-investigation