Basic Customization > Windchill Customization Basics > The Windchill Development Environment > Properties and Property Files > Application Context Service Properties for Subtypes
  
Application Context Service Properties for Subtypes
The application context service properties in service.properties and other files listed for WTServiceProviderFromProperties.defaultPropertyFiles and WTServiceProviderFromProperties.customPropertyFiles cannot reference requestor object types that are subtypes. Properties for client features that allow you to specify different services or resources for different subtypes must be put in a property file listed for one of the following properties in <Windchill>/codebase/wt.properties:
wt.services.applicationcontext.TypeBasedServiceProviderFromProperties.defaultPropertyFiles
wt.services.applicationtext.TypeBasedServiceProviderFromProperties.CustomPropertyFiles
If you need to add typed service property entries for your custom HTML clients, we recommend you put them in a new properties file or files used only for your customizations. This file should be added to the list of files for TypeBasedServiceProviderFromProperties.CustomPropertyFiles using the xconfmanager utility. This procedure is described in Managing Customizations.