Your NonStop application makes a Web service method call by sending a predefined interprocess message (IPM) request to the SOAPAMCP process and waiting for the response. The format of the request and response IPMs must correspond exactly to the definitions in your CDF.

CDF2DDL Method

Using the CDF2DDL method, generating the definitions of the IPMs that your application can use is a two step process. First, you use the CDF2DDL utility to generate a NonStop Data Definition Language (DDL) representation of the IPMs. Then, you use the NonStop DDL Compiler to generate C, COBOL, or other language-specific source code representations of the IPM definitions which can be compiled into your application. Although the DDL method can generate language specific source code for all host languages, IPM definitions are restricted by the DDL compiler to a maximum size of 32,767 bytes.

CDF2C Method

Using the CDF2C method, C language definitions are generated directly from the CDF. When using this method there is no size limit on the generated structure definitions.

This section explains these steps in greater detail.