哪里可以找到wdi详细的数据说明？

1. 你把WDI整个dataset下载下来（如果保存成Excel格式的话最新的版本大约100MB左右），里面有对各个变量详细的说明。

2. 如果你是直接在网页上打开的，也是有说明的。
（WDI的页面似乎有几个不同的版本）比如我搜索了“Charges for the use of intellectual property, payments (BoP, current US$)”这个变量，链接如下：
http://data.worldbank.org/indicator/BM.GSR.ROYL.CD
打开这个网页的话你可以看到有一个地方“Details”是可以点开的，里面有变量定义的详细说明
Charges for the use of intellectual property are payments and receipts between residents and nonresidents for the authorized use of proprietary rights (such as patents, trademarks, copyrights, industrial processes and designs including trade secrets, and franchises) and for the use, through licensing agreements, of produced originals or prototypes (such as copyrights on books and manuscripts, computer software, cinematographic works, and sound recordings) and related rights (such as for live performances and television, cable, or satellite broadcast). Data are in current U.S. dollars.