https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md eip title author discussions-to status type category created requires 712 Ethereum typed structured data hashing and signing Remco Bloemen <remco@wicked.ventures>, Leonid Logvinov <logv…

https://developers.google.com/search/docs/guides/intro-structured-data Structured data refers to kinds of data with a high level of organization, such as information in a relational database. When information is highly structured and predictable, sea…

https://static.googleusercontent.com/media/research.google.com/en//archive/bigtable-osdi06.pdf Abstract Bigtable is a distributed storage system for managing structured data that is designed to scale to a very large size: petabytes of data across tho…

https://developers.google.com/search/docs/guides/intro-structured-data Structured data refers to kinds of data with a high level of organization, such as information in a relational database. When information is highly structured and predictable, sea…

Strings can easily be written to and read from a file. Numbers take a bit more effort, since the read() method only returns strings, which will have to be passed to a function like int(), which takes a string like '123' and returns its numeric value…

1.使用DIH上传结构化数据 许多搜索应用索引结构化数据,如关系型数据库.DIH提供了一个这样的存储并索引结构化数据的机制.除了关系型数据库,solr可以索引来自HTTP的内容,基于数据源如RSS和ATOM feeds,e-mail库和结构化XML(可以使用XPath来生成字段) 更多信息参考 https://wiki.apache.org/solr/DataImportHandler. 1.1 Concepts and Terminology 概念和术语 Data Import Handler…

Abstract Introduction::  Bigtable设计主旨:可扩地扩展到pByte级别和数千台机器的系统, 通用.可伸缩.高性能.高可用性.  不实现完整的关系数据模型,而是支持一个可以动态控制,允许用户自解释数据属性:  用户甚至可以指定数据(使用时)是存在内存中还是磁盘中:  支持row级别的事务处理:不支持跨行事务:: 2. Data model数据模型:三位数据模型: row.column.timestamp.row:即数据的key,是任意字符串(其实不一定要求是“字符”…

http://spark.apache.org/docs/latest/sql-programming-guide.html…

https://github.com/ethereum/EIPs/blob/master/EIPS/eip-191.md eip title author status type category created 191 Signed Data Standard Martin Holst Swende (@holiman), Nick Johnson <arachnid@notdot.net> Draft Standards Track ERC 2016-01-20 摘要 这个ERC提议了一个…

核心数据结构: core.types.transaction.go type Transaction struct { data txdata // caches hash atomic.Value size atomic.Value from atomic.Value } Transaction.data type txdata struct { AccountNonce uint64 `json:"nonce" gencodec:"required"` Pric…