Core Schema Files in WSS 3.0

The following are the core schema files in WSS 3.0 and are really important when customizing the site definitions:

• WebTemp.xml -- Defines the configurations available for creating sites
• Onet.xml -- Defines the top navigation, quick launch areas, specifies which lists are available, specifies the document templates and defines the base types of lists
• Schema.xml -- Defines the forms, views, toolbars and any special fields for a list type

Always create a copy of these files instead of directly editing them. All the customized files are finally merged with the orginal one at runtime.