What Does Java API For XML-based RPC Mean?
Java API for XML-based RPC (JAX-RPC) is an API providing Java developers an option to include remote procedure calls (RPCs) and helps to invoke Java-based Web services.
Techopedia Explains Java API For XML-based RPC
JAX-RPC is/was part of the Java Web Services Developer Pack (WSDP), which enables Java programmers to work with Web services and other Web-based applications.
JAX-RPC 2.0 was later known as JAX-WS 2.0 (Java API for XML Web services).