add jdbc-driver : documentation incomplete or misleading

I want to add a jdbc driver to a profile. The driver has been uploaded to /deployment
[domain@localhost:9999 subsystem=datasources] pwd
/profile=default/subsystem=datasources
[domain@localhost:9999 subsystem=datasources] ./jdbc-driver=postgres9:add(driver-name=postgres9,deployment-name=postgresql-9.0-801.jdbc4.jar,driver-class-name=org.postgresql.Driver)
{
"outcome" => "failed",
"failure-description" =>

{"domain-failure-description" => "Operation handler failed: java.util.NoSuchElementException: No child 'driver-module-name' exists"}

,
"rolled-back" => true
}

Documentation says:

[domain@localhost:9999 jdbc-driver=h2] :read-operation-description(name=add)
{
"outcome" => "success",
"result" => {
"operation-name" => "add",
"description" => "Adds a new JDBC driver service",
"attributes" => {
"driver-name" =>

{ "description" => "The symbolic name of this driver used to reference it in the register", "type" => STRING, "required" => true }

,
"deployment-name" =>

{ "description" => "The name of the deployment unit from which the driver was loaded, if it was loaded from a deployment", "type" => STRING }

,
"driver-module-name" =>

{ "description" => "The name of the module from which the driver was loaded, if it was loaded from the module path", "type" => STRING }

,
"module-slot" =>

{ "description" => "The slot of the module from which the driver was loaded, if it was loaded from the module path", "type" => STRING }

,
"driver-class-name" =>

{ "description" => "The fully qualified class name of the driver's implementation of java.sql.Driver", "type" => STRING }

,
"driver-major-version" =>

{ "description" => "The driver's major version number", "type" => INT }

,
"driver-minor-version" =>

{ "description" => "The driver's minor version number", "type" => INT }

,
"jdbc-compliant" =>

{ "description" => "Whether or not the driver is JDBC compliant", "type" => BOOLEAN }

}
}
}

Here, only the driver-name is required.
For driver-module-name it says "if loaded from module", which I read as "optional".
Obviously from above error message, this is not optional