The file name for the resource bundle is usually the provider name, that is, the name defined in the display profile when the provider class is declared. For example:
<Provider name="Bookmark" class="com.iplanet.portalserver.providers.bookmark.BookmarkProvider">
Here, for the BookmarkProvider, the resource bundle file name is Bookmark.properties. The provider name will be retrieved via the ProviderContext.getProviderName() method.
The provider can also use a different name (different from the default name) for the resource bundle. The name must be passed as a key when calling ProviderAdapter.getResourceBundle(String key) method.