Adding custom XML configuration files to Xservices v18

Hello everyone,

Could you help me understand if that is possible to add XML configuration files to Oracle Retails POS Xservices (version 18.0.1) without touching the war file (c:/xservices/webapps/xservices-18.0.1.0.74-XST-0.0.0.war) and without using InstallX tool for building custom Xservices update packages (x.type=update)?

For Xstore and Xstore Mobile that is possible to add say c:/xstore/cust_config/version1/localconfig/DataSourceConfig.xml and it will override whatever configuration there is in c:/xstore/lib/config.jar and c:/xstore/lib/{customerId}-config.jar (in case configPath.properties is configured properly). I can't find any option to do same customization in Xservices.