Difference between revisions of "PrF UG slots value type instance"
(One intermediate revision by the same user not shown) | |||
Line 2: | Line 2: | ||
== The Instance Value Type == | == The Instance Value Type == | ||
− | {{PrF_UG_TOC_slots}}<div id='prf_ug'> | + | <noinclude>{{PrF_UG_TOC_slots}}<div id='prf_ug'></noinclude> |
A slot of type <b>Instance</b> has instances as values. | A slot of type <b>Instance</b> has instances as values. | ||
Line 28: | Line 28: | ||
The <b>Allowed Classes</b> pane will be displayed. | The <b>Allowed Classes</b> pane will be displayed. | ||
</p> | </p> | ||
− | <div>[[Image:PrF_UG_slots_value_type_instance.png| | + | <div>[[Image:PrF_UG_slots_value_type_instance.png|frame|none| |
+ | Slot Editor, "Instance" selected]]</div> | ||
<li><p> | <li><p> | ||
To add one or more allowed classes, | To add one or more allowed classes, | ||
click the <b>Add Class</b> | click the <b>Add Class</b> | ||
− | [[Image:PrF_UG_classes_class.add.gif|classes_class.add]] button. | + | ([[Image:PrF_UG_classes_class.add.gif|classes_class.add]]) button. |
</p> | </p> | ||
Line 42: | Line 43: | ||
to select a range, use the <b>Shift</b> key. | to select a range, use the <b>Shift</b> key. | ||
</p> | </p> | ||
− | <div>[[Image:PrF_UG_classes_classes_select.png| | + | <div>[[Image:PrF_UG_classes_classes_select.png|frame|none| |
+ | Select Classes dialog]]</div> | ||
<li><p> | <li><p> | ||
Line 62: | Line 64: | ||
<li><p> | <li><p> | ||
Click the <b>Remove Class</b> | Click the <b>Remove Class</b> | ||
− | [[Image:PrF_UG_classes_class.remove.gif|classes_class.remove]] button | + | ([[Image:PrF_UG_classes_class.remove.gif|classes_class.remove]]) button |
at the top of the <b>Allowed Classes</b> pane. | at the top of the <b>Allowed Classes</b> pane. | ||
</p> | </p> | ||
Line 73: | Line 75: | ||
takes instances of the class <b>Employee</b> as values. | takes instances of the class <b>Employee</b> as values. | ||
− | <div>[[Image:PrF_UG_slots_value_type_instance.png| | + | <div>[[Image:PrF_UG_slots_value_type_instance.png|frame|none| |
− | + | Slot Editor, "Instance" selected]]</div> | |
The instance <b>Chief_Honcho</b> is responsible for two instances | The instance <b>Chief_Honcho</b> is responsible for two instances | ||
Line 80: | Line 82: | ||
<b>Sports Nut</b> and <b>Ms Gardiner</b>. | <b>Sports Nut</b> and <b>Ms Gardiner</b>. | ||
− | <div>[[Image:PrF_UG_slots_value_type_instance_example.png| | + | <div>[[Image:PrF_UG_slots_value_type_instance_example.png|frame|none| |
− | + | Responsible For pane]]</div> | |
− | </div> | + | <noinclude></div></noinclude> |
Latest revision as of 18:55, November 13, 2008
The Instance Value Type
A slot of type Instance has instances as values. More specifically, when Instance is selected as the value type, you specify one or more allowed classes. An instance of the class with this slot then takes instances of the allowed classes or of their subclasses as the value(s) of the slot.
Setting the Value Type to Instance
To set the value type of a slot to Instance:
Create the slot, or view the Slot Editor for an existing slot.
Select Instance from the Value Type menu. The Allowed Classes pane will be displayed.
To add one or more allowed classes, click the Add Class () button.
Select the classes you want as allowed classes in the Select Classes dialog box. To select multiple classes, use the Ctrl (Cmd) key; to select a range, use the Shift key.
Click OK.
Removing an Allowed Class
To remove a class from the list of allowed classes for a slot of type Integer:
Select the classes to remove. To highlight multiple classes, use the Ctrl (Cmd) key. To highlight a range of classes, use the Shift key.
Click the Remove Class () button at the top of the Allowed Classes pane.
Example
In the Newspaper example, the slot responsible_for in the class Editor takes instances of the class Employee as values.
The instance Chief_Honcho is responsible for two instances which are descended from Employee: Sports Nut and Ms Gardiner.