5. Saving your DAML+OIL ontology

• Select Save As from the Project menu
• One of two windows will appear.  The left one appears if you have just created a new project, the right if you imported a .daml file.

 Completing the Project Field ^(NEW)

• In order to save you must first specify a project file with a valid path.  For instance, C:\ProgramFiles\Protege-2000\foo.pprj is a valid project file name.
 
• The .pprj (Protege project) file is required by Protege-2000.  This file will not be used by the DAML+OIL plug-in. When opening DAML+OIL ontologies with the plug-in, a built-in project file is being used that determines the layout of the forms for classes, slots, etc. (see Section 4 on Loading for more details).


There are two methods that one can use to write a correct path into the Project field.

• Typing in a correct path

You can type a path directly into the project field.  The file can exist already or it can be the name of a new file that you would like to create.  If it is a new file, though, it is important that the file be in a directory that does exist. So if the directory C:\MyFiles only contains the file example.pprj and no other files or directories, the following two names would be valid project file names
C:\MyFiles\example.pprj and C:\MyFiles\newFile.pprj.
          While this would not be a valid project file name:
C:\MyFiles\nonExistantDirectory\newFile.pprj.
Remember that the file needs to end with the extension ".pprj" whether it exists already or you are creating a new one.
• Clicking on the + over the Project field and using the file choose dialog

If you click on the button, a file chooser dialog will appear.  Navigate the dialog to the directory of your desired project file.  You can select an existing project file from that directory or type in the name of a project file that you would like to create.  (Remember that the project file name must end in ".pprj")  This method has the advantage of that it will automatically provide a correct path name.

• The chosen project file name is automatically copied into the DAML Ontology file name and the DAML Instances file name.
• You may change the DAML Ontology file name as well as the DAML Instance file name.
• If you do not change them then these files will be created (or replace the already existent files of the same name) in the same directory as the project file.
• If you do change them, be sure to give a valid path.  The method for specifying a valid path was mentioned above for project files.
The plug-in saves the same information in both files, the ontology file and the instances file.
• The namespace that you give will be used as the default namespace in the .daml file.
• All fields are obligatory.  Do not leave any blank.