This is a technique that applies a grouping of data on specified elements common to two data sources and then evaluates additional data elements for a level of commonality or distinctness.

这种技术在两个数据源公共的指定元素上对数据进行分组，然后估计其他数据元素的相同程度或差异程度。

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You have a huge grouping of consumer data, so you can micro-target messages to common groups, finding pleasure points and anger points on issues.

NEWYORKER: On the Bus

And they could not understand "why grouping of payments in bands for one, but not the other, presents data-protection or breach-of-confidence issues", as the BBC had insisted.

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