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Association: Project_Tasks_Task_Project (ProjectData service)

Office 2013

Last modified: May 30, 2012

In this article
Definition
Attributes
Parent element
Child elements

The Project_Tasks_Task_Project association relates a project to the tasks that it contains and relates a task to its project.

<Association Name="Project_Tasks_Task_Project">
  <End Type="ReportingData.Task" Role="Task_Project" Multiplicity="*" />
  <End Type="ReportingData.Project" Role="Project_Tasks" Multiplicity="0..1" />
</Association>

Attribute

Value

Description

Name

Project_Tasks_Task_Project

Identifies the entity types and the navigation properties that form the two-way association for projects and tasks. In the first half of the name, Project is the entity type and Tasks is the navigation property. In the second half of the name, Task is the entity type and Project is the navigation property.

Element

Description

Schema element: ReportingData

The schema for the reporting data in the ProjectData service.

The Project_Tasks_Task_Project association element contains two End elements that represent opposite ends of the association. The Role attribute is a lookup key that enables a navigational property to specify the direction in the association. The Multiplicity attribute refers to the entity type. Multiplicity indicates the number of entities that can be related at each end of the association: zero or one (0..1), or many (*). The Microsoft .NET implementation of OData uses 0..1 when the navigational property points to a single entity, rather than to an entity set.

Attributes of the End elements for the Project_Tasks_Task_Project association

Role

Type

Multiplicity

Description

Project_Tasks

EntityType element: Project

0..1

There is one project entity that corresponds to a collection of tasks. Those tasks belong to the project.

Task_Project

EntityType element: Task

*

There can be many task entities in a project (a project has at least one task, if you count the project summary task).

One end of the association is the Project entity, and the other end is the Task entity. The Project entity type contains the Tasks navigation property, where the FromRole defines Project_Tasks as the start of the association to get the collection of tasks in a project. Similarly, the Task entity type contains the Project navigation property, where the FromRole defines Task_Project as the start of the association to get the project that a task belongs to.

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