Projects refer to custom objects with information that meets the business requirements of your organization. When working with projects in the API, use the ProjectService class.
The API provides the following model interfaces for projects:
•The Project class, which contains information about the project.
•The ProjectAssignee class, which contains information about a user assignees to a project.
•The ProjectRelation class, which contains information about a contact related to the Involved party.
Refer to the ProjectService samples for examples of working with projects in the API.