Designing SCOadmin object service agents

Step 2: Define the class attributes

To add attributes to a class, select the class name from the main list and select Modify from the Class menu.

Edit Class dialog

Use the Add button to add a new attribute. The first attribute you should define an object class is its naming attribute -- its value is used as the name of the object itself.
To edit an attribute, select it in the list and use the description, type, syntax, operations, and filter controls. See ``About attributes'' for a complete description of these controls.
Some controls may stippled (unavailable) because they do not apply in certain circumstances. For example, some operations and filters are not valid for single-valued attributes.
If you have selected a syntax of enum, you can use the Values button to access a dialog that allows you to edit the list of available values for your attribute.

``Edit Class dialog'' shows the sco UUCPsystems example class with attributes set up as follows:

each of the six fields (site, schedule, type, phone, speed, script) constitute an attribute of the object, with the system attribute specified first because it determines the name of the object.
all attributes have a single type and no syntax.
all attributes have a get and replace operation.
an equal filter for the type attribute, since we may want to search for specific types of system connections (such as ACU).
another possibility would be to divide the speed field into a minSpeed and maxSpeed attribute, and supply equal, greater, and less filters for these attributes.