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British Library sets out to archive the Web

The British Library will use an automated Web harvester to archive about a billion pages, some of them daily.

Lefteris Pitarakis /Associated Press

The British Library will use an automated Web harvester to archive about a billion pages, some of them daily.

LONDON — For centuries, the British Library has kept a copy of every book, pamphlet, magazine, and newspaper published in Britain. Starting Saturday, it will also be bound to record every British website, e-book, online newsletter, and blog in a bid to preserve the nation’s ‘‘digital memory.’’ The library also has to make this digital archive available to future researchers.

It says the work is urgent; firsthand accounts of everything from the 2005 London transit bombings to Britain’s 2010 election campaign have already vanished.

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‘‘Stuff out there on the Web is ephemeral,’’ said Lucie Burgess, head of content strategy. ‘‘The average life of a Web page is only 75 days.”

Like reference collections worldwide, the British Library has been trying to archive the Web for years in a piecemeal way, having to get permission from website owners before taking snapshots of their pages. That began to change with a law passed in 2003, but it has taken a decade of legislative and technological preparation to begin a vast trawling of all sites that end with the suffix .uk.

An automated Web harvester will scan and record 1 billion Web pages. Most will be captured once a year, but hundreds of thousands of fast-changing sites such as those of newspapers and magazines will be archived as often as once a day. The library plans to make the content publicly available by year’s end.

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