The PROJECT field is the child of the AREA field. This relationship is more fully explained in the page on Business Area lists. The default project is used as the default project for all layouts, fields and values within the entire project, and each of these objects may be inherited from the default project to other projects within the business area. Each business area will have a minimum of two projects, the default project and a data project. The default project only stores the default metadata for the entire set of projects within the business area, and never stores any issue data. The remaining projects may store metadata that overrides the metadata within the default project as well as issue data for that project.
By convention, the default project always has a value for the field PROJECT_ID of zero. When a business area is created, the first two projects are named XXXX_DEFAULTS and XXXX_DATA where XXXX is the name of the business area. When you are modifying the data for a project, there are a number of behavior setting values you can override. The behavior settings are default-wide settings; if you provide entries within the default project, the values become the values for the entire business area. If you provide an entry within any project other than the default project, then the value is only used for that project. The behavior settings that can be modified in that way are used for email notification. The list is:
