<xs:element form="unqualified" name="arg1_string" type="xs:string"/>

In the Project Explorer, right-mouse click on your project, and select
Properties > Java Build Path
.
Select the Libraries tab.
Select
Add External JARs
.
Browse to [
Designer Installation
]
\designer\plugins\org.activebpel.enginep_
[
version_number
]
\server\shared\lib
Select
ae_rt.jar
, as shown:

Open your Java interface file and add the
@AeWsdlParam
annotation to each argument. For example:
Public interface IMyInterface {
        public void execute(
         @AeWsdlParam("someValue") String someValue);
}
Generate (or regenerate ) a WSDL by right-mouse clicking on a Java interface, and selecting
Generate WSDL
.

<xs:element form="unqualified" name="someValue" type="xs:string"/>

You should not edit the generated WSDL. If you update the Java interface, you must regenerate the WSDL.
You do not need to deploy
ae_rt.jar
. It is already on the server's
classpath
.
If you upgrade Process Developer to a new version, you must remove the older version of
ae_rt.jar
and re-add the new one.