Help:Searching

From Wiki.GIS.com

Contents 1 Search facilities in wiki.GIS.com 2 Tips 2.1 Search is case-insensitive 2.2 Boolean search possible 2.3 Words with special characters 2.4 Phrase 2.5 Wildcard 3 Search limitations 3.1 No regular expressions 3.2 Words in single quotes 3.3 Delay in updating the search index 4 Search options 4.1 Namespaces searched 4.2 Redirects can be excluded 4.3 The wikitext is searched 4.4 Highlighting 5 Other possibilities 5.1 List of all pages 5.2 Go button 5.3 Search field

Search facilities in wiki.GIS.com

On every page there is a search button with search box.

See also the "Search result settings" section in "my preferences" to modify how you would like your search results returned.

Tips

Search is case-insensitive

The searches for "shapefile", "Shapefile" and "SHAPEFILE" all return the same results.

Boolean search possible

You can use the words "and", "or" and "not" and parentheses in order to formulate more complicated requests. If none of those words is specified, "and" is used by default.

Words with special characters

In a search for a word with a diaeresis, such as Sint Odiliënberg, it depends whether this ë is stored as one character or as "ë". In the first case one can simply search for Odilienberg (or Odiliënberg); 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.

Phrase

Search for a phrase by enclosing it in double quotation marks.

Wildcard

You can use a wildcard *, at the end of a search term only. To search for pages with the words "boat" or "boats" search like this: "boat*". You cannot use "*boat" to find Riverboat, etc.

Search limitations

No regular expressions

You cannot use regular expressions.

Words in single quotes

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.

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.

Delay in updating the search index

For reasons of efficiency and priority, very recent changes to pages are not always immediately taken into account in searches.

Search options

Namespaces searched

The search only applies to the namespaces selected in the 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.

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.

Searching in single namespaces can also be achieved by typing the namespace, a colon, then the search term in the search box. For example, typing "Talk:Foo" will give all pages containing "foo" in the talk namespace.

Redirects can be excluded

Check or uncheck the tickbox "List redirects" in "Search in namespaces" box found at the bottom of a search results page.

The wikitext is searched

The wikitext (source text, what one sees in the edit box) is searched. This distinction is relevant for piped links, for interlanguage links, special characters (if ê is coded as ê it is found searching for ecirc), etc.

Highlighting

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 preferences.

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.

Other possibilities

List of all pages

• Special:Allpages - Alphabetic index for the main namespace

Please note that a-z come after A-Z.

For some other namespaces, see Help:Namespace.

Go button

See also Help:Go button.

Search field

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.