Changes in the supplemental-index

Johannes Beus
Google's supplemental-index has been a topic of this blog more than once. Besides a three part series on its origins I have regularly reported on its changes. The last time this happened was in December of last year when Google announced that they would stop displaying the supplemental-index completely. The differences between the two indexes were decreasing and they did not wish to make those searching more insecure. Shortly after the announcement they went through with this step, too. This has led the “site:-query”, which displays all indexed pages for a domain, to shoot up considerably for most sites. This was the case because now not only pages from the “first” but all pages were counted and displayed. In the diagram below, you can see this very well in the middle of December 2007 :


In the past few days there have once again been heavy changes after the numbers for “site:” have kept at a constant level for quite a while. In the above diagram we can see this exemplary well for Focus.de, Spiegel.de and Stern.de. The values are now much closer to what I “feel” is correct and it seems as if Google has internally made another step in integrating the supplemental-index into their “first” index .
Johannes Beus - on Sat (03/08/2008) at 19:41 PM

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