Difference between revisions of "MircWiki:Searching"

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==Search facilities in MediaWiki ==
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See [http://meta.wikimedia.org/wiki/Help:Searching this] page on the meta wiki page for help searching
This page explains the search button for the search box which appears on every page,
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and the "Search result settings" section in the [[Help:Preferences|preferences]].
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=== list of all pages ===
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*'''[[Special:Allpages]] - Alphabetic index for the main namespace'''
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Please note that a-z come after A-Z.
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For some other namespaces, see [[Help:Namespace]].
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=== Go button ===
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See also [[Help:Go button]].
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=== Search field ===
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Pressing the [Enter] key while the search field is active is equivalent to clicking on the [Go] button.  While this is obvious when using Internet Explorer (tested on version 6), Mozilla (version 1.6 at least) provides no such indication.
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==Tips==
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===Avoid short and common words===
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This is the most likely cause of an unexpected failed search.
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If your search terms include a common "stop word" (such as "the", "one", "your", "more", "right", "while", "when", "who", "which",
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"such", "every", "about", "onto"), then your search will fail without any
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results. Short numbers, and words that appear in half of all pages, will also not be found.
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In this case, drop those words and rerun the search.
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See [[Help:Common words, searching for which is not possible]] for the stop words filtered out by the database. From there one can at least go to a page with a stop word as title. Searching for the combination of one or more words and the common word "not" give a database query syntax error due to a bug in the software.
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See [[Help:Short words in searches]] for a procedure to allow MySQL to index words shorter than four letters.
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===Search is case-insensitive===
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The searches for "fortran", "Fortran" and "FORTRAN" all return the same results.
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<!-- ===Boolean search possible===
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You can use the words "and", "or" and "not" and parentheses in order to
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formulate more complicated requests.
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If none of those words is specified, "and" is used by default.
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For instance, "indian not american" will return all pages that contain the
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word "indian" but don't contain the word "american".
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The search "(Adolph or Adolf) and Hitler" will return all pages which
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contain "Hitler" and either "Adolf" or "Adolph".
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-->
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===Words with special characters===
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In a search for a word with a [[w:diaeresis|diaeresis]], such as Sint Odili&euml;nberg, it depends whether this ë is stored as one character or as "&amp;euml;". In the first case one can simply search for Odilienberg (or Odili&euml;nberg); in the second case it can only be found by searching for Odili, euml and/or nberg.  This is actually a bug that should be fixed -- the entities should be folded into their raw character equivalents so all searches on them are equivalent. See also [[Help:Special characters]].
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=== Phrase ===
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There is no method for searching for a phrase.  Contrary to what you might expect, enclosing phrases in double quotation marks such as "can of tuna" will retrieve all pages containing "of" "tuna" and "can".
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==Searching limitations and Gotchas==
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===No regular expressions or wildcards===
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You cannot use [[w:regular expression|regular expression]]s or wildcards such as ? or *. If you don't know what that is, don't worry about it. To search for pages with the words "boat" or "boats" search like this: "boat or boats".
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===Words in single quotes===
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If a word appears in a page with single quotes, you can only find it if you search for the word with quotes. Since this is rarely desirable it is better to use double quotes in pages, for which this problem does not arise.
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An apostrophe is identical to a single quote, therefore Mu'ammar can be found searching for exactly that (and not otherwise). A word with apostrophe s is an exception in that it can be found also searching for the word without the apostrophe and the s.
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===Delay in updating the search index===
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For reasons of efficiency and priority, very recent changes to pages are not always immediately taken into account in searches.
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==Search Options ==
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===Namespaces searched===
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The search only applies to the [[Help:Namespace|namespace]]s selected in the [[Help:Preferences|preferences]]. To search the other namespaces check or uncheck the tickboxes in "Search in namespaces" box found at the bottom of a search results page. Depending on the browser, a box may still be checked from a previous search, but may no longer be effective. To be sure the box is in effect, uncheck and recheck it.
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Searching the image namespace means searching the image descriptions, i.e. the first parts of the image pages. For searching the titles, use [[Special:Imagelist]].
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The URL is
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http://meta.wikimedia.org/wiki/Special:Search?ns0=1&ns1=1&ns2=1&ns3=1&ns4=1&ns5=1&ns6=1&ns7=1&ns8=1&ns9=1&ns10=1&ns11=1&ns12=1&ns13=1&ns14=1&ns15=1&fulltext=Search&search=qqq
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where "qqq" is used as example for the search term, and the namespaces to be searched are specified.
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Thus, e.g.
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http://meta.wikimedia.org/wiki/Special:Search?ns10=1&ns11=1&fulltext=Search&search=test
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searches the Template and Template talk namespaces for "test", and
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http://meta.wikimedia.org/wiki/Special:Search?ns6=1&fulltext=Search&search=jpg
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searches the image description pages for "jpg".
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To search the Help pages use http://meta.wikimedia.org/w/index.php?title=Special%3ASearch&ns12=1&&fulltext=Search&search=x and replace the x in the URL by the search term. Replacing it in the search box does not work the same: the search is then in the namespaces specified in the preferences, instead of just in the help namespace.
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The number of search results reported seems to be the total for all namespaces; accordingly there are links to supposed other pages with results; correctly a lower number of results is actually presented.
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(Also there is a special search feature [[Special:Imagelist]], which searches in titles, regardless of whether there is an image description.)
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===Languages searched===
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See the feature request at [[MediaZilla:1837]].
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===Redirects can be excluded===
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Check or uncheck the tickbox "List redirects" in "Search in namespaces" box found at the bottom of a search results page.
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===The wikitext is searched===
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The [[w:wikitext|wikitext]] (source text, what one sees in the edit box) is searched. This distinction is relevant for [[Help:Piped link|piped links]], for [[Help:Interwiki linking|interlanguage link]]s, [[Help:Special characters|special characters]] (if ê is coded as &amp;ecirc; it is found searching for ecirc), etc.
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===Highlighting===
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Some portions of matching pages that contain the searched-for terms are shown, with the terms highlighted in red. You can set the number of lines extracted and the amount of text per line shown in your [[special:preferences|preferences]].
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If you search e.g. for "book" you get only pages with that word, not pages with "books" only. However, on pages with "book" and "books", also the part "book" of the word "books" is highlighted.
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Latest revision as of 14:40, 24 August 2006

See this page on the meta wiki page for help searching