The Data Retention Directive was passed in 2006 by the European Union.

数据保留法令由欧盟于2006年发布。

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The idea is to match up active customers with customers from historic retention data who share similar attributes.

也就是将这些活跃的顾客和历史保留数据中有相似特质的顾客相匹配。

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The RETENTION element specifies how long you will hold the data.

RETENTION元素指定了您会将该数据保留多久。

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Legal opinion sought by the Information Commissioner said the data retention powers could contravene European laws on human rights and privacy.

BBC: Privacy fears over EU snooping plans

What are the data retention policies?

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That's a pretty significant change, as the previous policy boasted data retention limits of only 90 days.

ENGADGET: Yahoo to retain search data for 18 months, says it's in your best interest