Aus SubmersWiki

Consider the Wikipedia article on Berlin. This article contains many links to other articles, such as «Germany», «European Union», and «United States». However, the link to «Germany» has a special meaning: it was put there since Berlin is the capital of Germany. To make this knowledge available to computer programs, one would like to «tag» the link

[[Germany]]

in the article text, identifying it as a link that describes a «capital property». With SMW+, this is done by putting a property name and :: in front of the link inside the brackets, thus:

[[capital of::Germany]]

In the article, this text still is displayed as a simple hyperlink to «Germany». The additional text capital of is the name of the property that classifies the link to Germany. As in the case of categories, the name of the property is arbitrary, but you should try to re-use properties that already appear elsewhere.

To simplify this re-use, every property has its own article in the wiki, just as every category has an article. You can see all the properties in use in the wiki with the Special:Properties page. Just as category articles are prefixed with Category:, all property articles are prefixed with Property: to distinguish them from other articles. So you can also also use the Special:Search page to find existing properties. As with categories, a property's article can be empty, but it is strongly recommended to add a description that explains the intent of the property and its proper usage.