Relationships to other wiki pages

To create a relationship to another wiki page, you simply add the relationship name to a normal wiki link, separated with a double-colon (::).

Berlin is the capital of [[capital of::Germany]].

If the link displays different text than the title of the wiki page, we use typical EdgeWiki syntax.

Berlin is the capital of [[this country >> capital of::Germany]].

If you don’t want to create a link to the wiki page, you can use the set macro, which isn’t displayed in the rendered page, but does establish the relationship.

Berlin is the capital. {{?set capital of::Germany}}

Some properties support multiple values; multiple hyperlinks and/or set macros can be used as expected.

Rome was the capital of the [[capital of::Roman Empire]] and is now the capital of [[capital of::Italy]].

Simple properties (relationships to simple values)

Simple properties use basically the same syntax.

I was born on [[birth date::June 19, 1975]].

In this case, even though the hyperlink syntax is used, “June 19, 1975” will not be rendered as a hyperlink.

Complex properties (relationships to complex values)

If “has degree” or “employment” is a complex property with properties of its own, use hierarchical syntax as follows.

John Smith was granted an [[has degree::degree::MS]] in [[has degree::major::Computer Science]]
on [[has degree::degree date::June 3, 1999]]. He has been employed by
[[employment::employer::Logos Bible Software]] since [[employment::hire date::July 1, 2006]].

For complex properties that can be specified more than once, use a disambiguating identifier after the property name, separated by a single colon (:).

John Smith was granted a [[has degree:1::degree::MS]] in [[has degree:1::major::Computer Science]]
and [[has degree:1::major::Mathematics]] on [[has degree:1::degree date::June 3, 1999]]. John
Smith was also granted a [[has degree:2::major::Basket Weaving]] [[has degree:2::degree::PhD]] on
[[has degree:2::degree date::June 3, 2004]].

He was initially employed by [[employment:1::employer::Taco Bell]] from [[employment:1::hire date::June 4, 2004]]
to [[employment:1::termination date::June 15, 2006]], but now works for
[[employment:2::employer::Logos Bible Software]].

Defining relationships

To define relationships, we create a special page that describes the relationships in one or more tables. (Multiple tables are not necessary but can be used to help readers find the relationship.) Tables must have a heading row with headings for Name and Type and optionally Description and RDF Type.

? SemanticRelationships

! Semantic Relationships

!! Nations

|** Name | Type | Description |
| capital of | page | The capital of the nation. (See [[Capitals of Nations]].) |

!! Degrees

|** Name | Type | Description |
| has degree | complex | A degree of the person. |
| degree | string | The degree. |
| major | page | The major. |
| degree date | date | The date that the degree was earned. |

!! Misc
|** Name | Type | Description | RDF Type |
| {{?semrel description}} | string | | {{~ {http://purl.org/dc/elements/1.1/}description}} |
| {{?semrel author}} | page | | {{~ {http://purl.org/dc/elements/1.1/}creator}} |

If there is a page link in the description, it becomes the official page for that relationship.

Supported Types

• page
• string
• integer
• float
• date
• complex

Built-in Relationships

Syntax

They query syntax is based on SMW’s (http://semantic-mediawiki.org/wiki/Help:Selecting_pages).

Queries are made up of a series of conditions, followed by a series of parameters joined by |. Conditions are logically ANDed together. Parameters affect the presentation of the query results.

Get the pages with a relationship department having a value Development .

[[department::Development]]

Format the results as an unordered list.

[[department::Development]] | format=ul

Get the pages with a relationship department having a value Development and a relationship gender having a value male.

[[department::Development]] [[gender::male]] | format=ul

Get the pages with a relationship department having a value Development and a relationship degree having any value.

[[department::Development]] [[degree::+]]

Use Dept as the heading for the column department .

[[department::Development]] | ?department=Dept

[[department::+]] | values

| relationships

[[department::Web Development]] | relationships

[[employer::Logos Bible Software]]

[[employment::employer::Logos Bible Software]]

[[employment::employer::Logos Bible Software]] [[employment::hire date::>1/1/2000]]

[[employer::+]] [software]

Inline Queries

{{?ask [[employer::Logos Bible Software]] | ?hire date | format=ul}}

{{{?ask
[[employer::Logos Bible Software]]
| ?hire date
| format=ul
}}}

{{?semrel employer}}

URL Queries

Queries can be passed to the ad-hoc query page via the query parameter. The colons (::) must be escaped.
http://examplewiki/query.aspx?query=[[employer%3A%3ALogos Bible Software]]|?hire%20date

{"Results":[{"Page":"John Smith","hire date":"7/1/2006"},{"Page":"Harry Jones","hire date":"8/15/2006"}]}

processData({"Results":[{"Page":"John Smith","hire date":"7/1/2006"},{"Page":"Harry Jones","hire date":"8/15/2006"}]})

John Smith was born [[birth::date::7/29/1979]].
{{?set birth::recurrence::yearly}}