# Plugging In Property Pages

The `org.eclipse.ui.propertyPages` extension point from the base Eclipse Platform is used to contribute property pages.
What is a property page? It is a page that shows up in the Eclipse Properties dialog that users get to by right-clicking on an object within any tree or table view, and selecting the Properties action.

Extenders supply one or more `<page>` elements within the beginning and ending `<extension>` element for this. The attributes of this `<page>` element are:

- id. A unique ID for this extension point. Not actually used, but required by Eclipse.
- name. A translated node-name to show in the left tree view in the Eclipse-supplied Properties dialog that comes up when the user selects "Properties..." from the pop-up menu.
- icon. An optional icon to show in the Properties dialog for this property page.
- class. The fully qualified name of the class that implements the Eclipse interface `org.Eclipse.ui.IWorkbenchPropertyPage`. This is usually done by extending the Eclipse class `org.Eclipse.ui.dialog.PropertyPage`. Your class will populate the detail page on the right of the Eclipse-supplied Properties dialog when the node-name is selected in the left hand tree view.
- objectClass. Specify the class or interface of the model objects for which this property page should be registered. Available interfaces are are identical to those in the `popupMenus` extension point.
- filtering criteria. To scope which objects these property pages should show up for, there are a series of filtering attributes. These attributes are identical to those in the `popupMenus` extension point.

## Programming Details

To use this extension point your class will typically extend `SystemBasePropertyPage` to make it easier to create these property pages for remote objects. The only methods you must implement in your class are `createContentArea(Composite)`, which populates the details page on the right side when the node is selected on the left side; and `verifyPageContents()` which, naturally, validates the contents of the page.

See the property page tutorial for a step-by-step example.

See the Eclipse Platform Programmer's Guide for more background information.