About the Object Explorer and Object List Editor
The Object Explorer is a window that displays the Siebel object hierarchy. It includes a tree structure which facilitates navigation through the object types that the hierarchy contains.
The Object List Editor is a window that displays the object definitions of the object type that is selected in the Object Explorer. You can view and modify object definitions in the Object List Editor window.
For more information about the object hierarchy that Siebel CRM uses, see Configuring Siebel Business Applications.
The following image illustrates the Object Explorer and Object List Editor in Web Tools. A similar Object Explorer and Object List Editor is available in Siebel Tools:
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Object Explorer. In this image, the Application object type is selected in the Object Explorer.
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Object List Editor. In this image, the Applications list appears (and corresponding object definitions) in the Object List Editor. For more information, see Using the Object List Editor.

An object type is an entity that includes a predefined set of properties. You can use it as a template to create an object definition. An application is one kind of object type. For more information, see About Predefined Objects.
An object definition implements one piece of the software. This object definition consists of object properties, which are characteristics of this piece of the software. The Object Explorer and Object List Editor display all the object definitions that the repository contains. Siebel Field Service is an example of an object definition of an application. Siebel CRM uses the terms attribute and property. These terms have the same meaning.
If an object type is not visible in the Object Explorer, then you can display it. For more information, see Displaying Object Types in the Object Explorer.