Web hosting india - Use of RSS and Atom Versions The use
Use of RSS and Atom Versions The use of RSS 0.91 has persisted surprisingly well, considering that it was nominally replaced by version 0.92 in December 2000 and RSS 2.0 in September 2002. This chapter was written in October 2004, when RSS 0.91 remains in widespread use. Total information feeds at the time of writing are thought to be approaching 10 million, of which maybe half are active. In order to gain some impression of the relative usage of various versions of RSS and Atom, we used the feeds listed on the Syndic8.com Web site. Given that the numbers of registered feeds is small relative to the total estimated number of feeds, there has to be some uncertainty about exact proportions of usage of the different versions. RSS 0.91 remains a frequently used information feed technology among the feeds listed on Syndic8.com. RSS 0.91, 1.0, and 2.0 and Atom 0.3 all have widespread usage. RSS 0.92 has significant usage but perhaps an order of magnitude less than the other four technologies just mentioned. The following table summarizes one set of data, gleaned by exploring Syndic8.com, about the usage of different versions of Atom and RSS current at the time of writing. Technology Version Number of Feeds Atom Pre-IETF 20,470 RSS 0.91 41,444 RSS 0.91fn 2 RSS 0.92 1,489 RSS 0.92d2 0 RSS 1.0 15,801 RSS 2.0 37,771 Total Feeds 80,129 You may notice that the total number of feeds, 80,129, is less than the sum of the feeds for individual versions. We are not sure as to the cause of the discrepancy. In part it may arise because some feeds provide information in more than one format. However, the purpose of showing the table is simply to capture the relative market share of different flavors of RSS and Atom late in 2004. Despite the uncertainties about the figures, however, it seems clear that Atom 0.3 (the pre-IETF version), RSS 0.91, RSS 1.0, and RSS 2.0 are the dominant information feed technologies. RSS 0.92 is fifth in the pecking order, an order of magnitude lower than RSS 1.0. If you want to do a similar analysis on Synic8.com to estimate how market share has changed since this chapter was written, visit the Syndic8.com Web site, select the Feeds link, and use the search facilities to specify format and version to explore how numbers have changed. 20 Chapter 2
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