You can customize the input and output XML templates of an API call. Additionally, you can define new mashup layers.
Mashups are present in the <INSTALL_DIR>/repository/eardata/wsc/war/mashupxmls/ directory.
Important: For all the application-provided mashups, the
DisplayLocalizedFieldInLocaleattributes are added to call mashups. Similarly, the
MaximumRecordsattribute is added to call list APIs. Therefore, you must manually add these attributes for custom mashups.