| "xml facets" | Posts with "xml" and "facets" tags |
| "xml !facets" | Posts with "xml" but not "facets" |
| "javscript|online" | Posts with "javscript" or "online" (no spaces allowed) |
| "!javscript|online yo-yo" | Posts with neither "javscript" nor "online" but with "yo-yo" |