http://turbo10.com/ claims that (a) most search engines access only the surface net, comprising only 10% of the whole, whereas (b) they access the "deep net" including the other 90%. A moments inspection reveals they do this by in fact creating channels (aggregated collections of search engines) which themselves can index and retrieve documents others cannot. All of this of course is actually a fairly apt description of much of chemistry, which could fairly be said to be "deep" (along with the likes of SciFinder, Crossfire, etc) http://turbo10.com/ currently claim to include some 1100 such "deep net" search engines, amongst them for example I spotted the chemsoc.org engine (although I did not find many other overtly chemical search engines). The media appear to have recently discovered turbo10 and its currently being much hyped up (to the extent the site is actually disabled at the moment due to high load). The site also claims you can design your own "deep net" search; hence I wonder if anyone reading this list has perhaps tried to create a "deep chemistry" collection? If I throw modesty to the winds, I might point out our own "deep chemistry" concept, published in 2000; http://www.ch.ic.ac.uk/rzepa/ijc/search_channels/ It is also interesting to speculate whether RSS (upon which I posted some weeks ago) might form the basis of another form of "deep net" search, but one constructed more on a peer2peer community basis. If anyone wants to see the article we ended up writing on that subject, its at http://www.ch.ic.ac.uk/rzepa/rss/ (and published in the Internet J. Chemistry). If you want to find out more about how RSS might develop in this direction, go to http://www.newsmonster.org/semantic.html By the way, the known collection of RSS chemistry sites now includes eg Webelements: http://www.webelements.com/board/backend.php IJC: http://www.ijc.com/abstracts/rss.xml etc etc (dont try to open these in Web browsers, but register them in RSS clients). -- Henry Rzepa. Imperial College, Chemistry Dept. +44 0778 626 8220 +44 020 7594 5804 (Fax) chemweb: A list for Chemical Applications of the Internet. To post to list: mailto:chemweb@ic.ac.uk Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To (un)subscribe, mailto:majordomo@ic.ac.uk the following message; (un)subscribe chemweb List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)