What are the project parameters?

Project parameters specify various aspects of project behavior. Each parameter has a name and a string value. When a project is created, it comes with a set of default project parameters that set up a correspondence between file system URLs and locations within a datatore project.

Default Project Parameters

The default project parameters are the set of parameters that come with a About Projects.

The default project location parameter is PROJECT_DIR, which represents the location of a project's top-level directory in a datastore, for example, /Projects/warehouse. You specify the name of the location parameter when you create a project. PROJECT_DIR cannot be edited in the parameters editors. You can edit the parameter name using the air project modify command (see the Guide to Managing Technical Metadata for details).

The other default parameters (see the table below) refer to PROJECT_DIR in their values through $ substitution. For example, DML has a default value of $PROJECT_DIR/dml. These default parameters represent the locations of various directories in the project, and you can edit them in the Parameters Editors.

Table 1
Parameter name	Represents the location of the Directory that:
DML	Stores record format files
XFR	Stores transform files
PWD	The internal system uses to translate relative paths to absolute paths
RUN	The graphs of the project execute in
DB	Stores database interface files

You can reference project parameters from the graphs in the project, and the components in them, using $ substitution.

You can view and edit project parameters or add new parameters directly by using the Project  Parameters Editor, or indirectly by using the Sandbox Parameters Editor and then checking the project in to the datastore. The latter method is strongly recommended.