https://www.suws.org.uk/wiki/index.php?action=history&feed=atom&title=PropertyProperty - Revision history2026-04-30T01:59:43ZRevision history for this page on the wikiMediaWiki 1.39.5https://www.suws.org.uk/wiki/index.php?title=Property&diff=119&oldid=prevDavidNewman: Added page2011-09-11T19:36:03Z<p>Added page</p>
<p><b>New page</b></p><div>In Semantic MediaWiki, a property gives machine-processable description of some feature of an object, such as its weight, size, location, or its owner. The property is written as an ''annotation'' in the article about the object that it describes.<br />
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The default for a property is that its value has its own article in the wiki.<br />
For example, given <tt><nowiki>[[My Prop::Some Value]]</nowiki></tt>, SMW assumes ''Some Value'' has its own page in the wiki (whether or not it exists) and displays it as a link. This means that by inserting ''Some Prop Name::'' in front of a regular MediaWiki link in an article, you can express '''why''' one article links to another. Properties that establish relationships between two pages this way are sometimes called relations.<br />
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A property can have, but does not require, a page in the wiki, in the special namespace <tt>Property:</tt>. Like [[Categories]], if there are any pages using a property they will appear on its page, even if it has no user-written text.<br />
You can and should add text to the page for each property explaining its intended use.<br />
By specifying [[Property:Has type|Has type]] in the page for the property, you can specify the type of the property is a string, or a date, or a user-defined type such as area or currency (the default is [[Type:Page]]). Once you have done this, by replacing a value in with ''<nowiki>[[Another Prop::the value]]</nowiki>'', you can express '''what''' the value means.<br />
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The special page [[Special:Properties]] lists all user-created properties in a wiki.<br />
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=== Reserved property names ===<br />
Several property names have predefined meaning in Semantic MediaWiki, such as "[[Property:has type|has type]]" and "[[Property:Allows value|allows value]]".<br />
These ''special properties'' appear in italics in the factbox of pages that use them.<br />
See a [[:Category:Special property|list of these special property names]],<br />
and do not use these reserved names for your own properties.</div>DavidNewman