GraphStructure

A Documentation of the structure behind the Graph.

Graph Structure

Topic

A topic describes a learning content. (As most items in the graph are topics, their type/class is not explicitly defined.) It uses subclass of to link to a defined Category, that is used to group topics. A depends on link from one topic to another indicates that the other topic is necessary prerequisite knowledge. A related to link indicates a similar topic. Additionally for each topic, resources can be associated with resource.

A short overview of possible links:

Topic	— subclass of →	Category
Topic	— depends on →	Prerequisite (another item)
Topic	— related to →	Equivalent (another item)
Topic	— resource →	Resource
Topic	— instance of →	Application

Additionally an item can be defined further by linking an importance-item using importance. This can be done as simple link or as an added value to a property. See Section: Importance

Resources

A Resource is an item that contains a link to some resource (property: url) hosted on the Wiki or on another platform. It usually is an instance of a Resource Class, as seen below.

All classes that a resource can be an instance of

A short overview:

Resource	— url →	URL
Resource	— instance of →	Resource Class

See: Item:Q280 as an example and Resource to reference a dummy element

Category

A general category, such as "Mathematical Foundations"; used to group topics.

A short overview:

Category-Item

— instance of →

Category

Course of Study

This item describes the course of a study path and bundles the set of courses that are included in that path. This is used for example to display the path through a major that a student is enrolled in and what lectures or courses are part of the program.

A specific Course of Study is declared by making it an instance of the Course of Study-Item and then linking a course to it using the includes-property.

Course of Study-Item	— instance of →	Course of Study
Course of Study-Item	— includes →	Course-Item

TODO: example

Course

A course encompasses a collection of learning contents. To declare an item as a Course use instance of. It is the equivalent of a course officially taught by the university that a student enrolls in.

Futhermore a course can include several other items, such as a Session-Item, a Category-Item or any learning content-Item directly. This structure can later be used to help classify which course an item can belong to.

The diagram on the left gives a simple illustration of how this graph structure works.

A short overview:

Course	— instance of →	Course
Course	— taught by →	Educator
Course	— includes →	Session item
Course	— includes →	Learning Content
Course	— includes →	Category item

See: Item:Q171 as an example.

A course can include multiple Sessions, as seen below. These may be used to structure the course contents.

Session

A Session allows grouping multiple items that are discussed within an actual course session.

The Sessions and their topics for the CGBV-course

See: Item:Q248 as an example.

A short overview:

Session-Item	— instance of →	Session
Session-Item	— includes →	Item
Course-Item	— on date →	Date

Coursework

Defines work that is to be done for a course, such as mandatory exercises or exams. An item is marked as coursework by making it an instance of Coursework.

It can be used to create a Template:Learning Path using syntax like:

{{Learning Path|quiz=wd:Q451}}.

A short overview:

Course Work-Item	— url →	URL
Course Work-Item	— instance of →	Course Work
Course Work-Item	— importance →	Importance-Item
Course Work-Item	— includes →	Item
Course Work-Item	— language →	Language-Item

See: Item:Q451 as an example.

People

Student

The role of a student is declared by linking from an item to Student using instance of. The student then can link their item to others using interested in and has completed to organize their interests and progress.

A short overview:

Student-Item	— instance of →	Student
Student-Item	— interested in →	Item
Student-Item	— has completed →	Item
Student-Item	— participates in →	Course, Session

See: Item:Q157 as an example.

Educator

The role of an educator is declared by linking from an item to Educator using instance of.

See: Item:Q158 as an example.

Importance

An items that describes an importance to learn a learning content. It's linked to using importance.

Item	— importance →	Mandatory
Item	— importance →	Essential
Item	— importance →	Recommended
Item	— importance →	Optional

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Properties

List of Properties

Important Properties:

Property	Name	Used for	Links to →
Property:P1	depends on	Prerequisites	Learning contents
Property:P2	subclass of	Grouping items into Topics	Categories
Property:P3	instance of	Abstract Classes	Category
Property:P4	related to	Equivalents	Learning contents
Property:P14	includes	Making a list of items	Learning Contents, Sessions
Property:P37	properties for this type	List of properties that apply	Property
Property:P21	resource	Link to a resource	Resources
Property:P20	url	save a URL	URL
Property:P11	image	declare images for items	Image (from Wikimedia Commons)
Property:P12	has completed	Completion	Learning Contents, (Sessions, Courses)
Property:P23	interested in	Declare interests	Learning contents
Property:P25	participates in	Participation	Courses, Sessions
Property:P13	importance	Declaring importance	Learning contents
Property:P16	created by	Author	Person
Property:P17	modified by	Author	Person
Property:P22	certified by	Author	Educator
Property:P24	taught by	Author	Educator
Property:P19	on date	Timeliness	Date
Property:P15	comment	Note something	String
Property:P26	language	Declare the language	Items

Items using property for this type and what properties they link to:

Useful Pages

• DebugQueries
• Query Service