Sentence:  Previous editions of "World Development Indicators" used <WSD>revision</WSD> 2, first published in 1948. <WSD>Revision</WSD> 3 was completed in 1989, and many countries now use it. But <WSD>revision</WSD> 2 is still widely used for compiling cross-country data. 
Meaning of the word marked with <WSD> tags:  A changed edition, or new version; a modification.