PrF UG slots value type symbol

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The Symbol Value Type

Protege-Frames User's Guide
The Slots Tab
The Slot Browser
The Slot Buttons
The Slot Menu
The Slot Editor
The Value Type Menu
The Any Value Type
The Boolean Value Type
The Class Value Type
The Float Value Type
The Instance Value Type
The Integer Value Type
The String Value Type
The Symbol Value Type
Creating a New Slot
Viewing a Slot
Editing a Top-Level Slot
Overriding Slot Properties at a Class
Editing Slot Properties
Removing a Slot from a Class
Deleting a Slot from the Project
Adding a Slot to a Class
Removing Overrides From a Slot
Understanding Inverse Slots
Creating an Inverse Slot Relationship
Working with Subslots
Finding a Slot
The Slot Hierarchy Window
The Slot Icons
The Superslots Pane
Glossary, Editing Help

A slot of type Symbol allows you to create a predefined list of strings; an instance of a class chooses from among these strings. When Symbol is selected as the value type, the Allowed Values pane is displayed. An instance then takes string(s) from among the allowed values as the value(s) of the slot.

To set the value type of a slot to Symbol:

  1. Create the slot, or view the Slot Editor for an existing slot.

  2. Select Symbol from the Value Type menu. The Allowed Values pane will be displayed.

  3. Create the values you want as the list of available values for a slot. To create a value:

    • Click the Create Value (all_object.add) button at the top of the Allowed Values pane.

    • Type the string you want in the Create Symbol window. You can enter ASCII characters, including upper and lowercase letters, numbers, and other common characters, such as !, _, and %.

    • Click OK.

  4. When you have created all the values you want for this symbol, fill in the other fields as desired.

To edit a pre-existing value:

  1. Click the View Value (all_object.view) button at the top of the Allowed Values pane.

  2. Edit the string in the Edit Symbol window.

  3. Click OK.

To remove a value from the list of values:

  1. Select the values to remove. To highlight multiple values, hold down the Ctrl (Cmd) key while clicking each value. To highlight a range of values, click the first value, then hold down the Shift key and click the last value in the range.

  2. Click the Remove Value (all_object.remove) button at the top of the Allowed Values pane.


For example, the weekday slot at the class Prototype_Newspaper allows you to choose from among the seven days of the week: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday.

"weekday" slot

An instance has a pop-up menu that allows a user to choose one of the symbol values for the slot:

Instance dialog, showing pop-up menu

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