The Tclers Wiki search page is available at http://wiki.tcl.tk/_/search . This search corresponds to the search in titles box in the left column. It is based on sqlite's full text search . The search string is passed as MATCH argument, including the * characters. Check http://www.sqlite.org/fts3.html for more information about sqlite and full text search.
jdc 31-oct 2011 The * used in previous versions of the search to distinguish between searching in titles or page content is no longer supported. Searches are now always done on titles and page content. The results are listed sorted on the last-edited-data, most recent first. (AMG) Results are presented in two groups, depending on where the match was found: in the page name or contents.
The sqlite in use at the wiki has been compiled with -DSQLITE_ENABLE_FTS3_PARENTHESIS so the Enhanced Query Syntax is available. This makes is possible to do the searches with an implicit AND as before but also allows you to refine your search using the AND, OR and NOT keywords.
jnc: Using the FTS3 Parenthesis option, you can now search for things such as "https NOT soap" or "https AND (soap OR json)"