IWS needs web service to return only the array rows used

Running iOS 7.1 (TR8, I think).

I'll be using the Integrated Web Services wizard to generate a web service that provides data to a business partner. I need to send data in the form of multiple arrays. I am able to do this by having the service program function return data structures shown in D-specs similar to below (simplified a bit here), but the actual number of array rows used will vary, up to the dim limits.

D GetEBPPdata3...
D PR Extproc('EBPPTEST3')
D likeDS(rtnDS) RTNPARM
D Account 7a const
D Phone 13a const
D EmailIn 64a const

D rtnDS ds qualified
D Account likeDS(Set1)
D PhonesCount 10i 0
D Phone likeDS(Set2) dim(32)
D PaymentsCount 10i 0
D Payment likeDS(Set3) dim(16)

* fields that pertain to Account
d Set1 ds qualified inz
d Success n inz
d MsgText 128a
d DateDue 10a
d NextAutoPayDate...
d 10a

* fields that pertain to each phone on account
d Set2 ds qualified inz
d PhoneNumber 10 0 inz
d AmtDue 8 2 inz
d BankRouting 9 0 inz
d BankAccount 16a

* fields that pertain to each prior payment
d Set3 ds qualified inz
d PhoneNumber 10 0 inz
d Amount 8 2 inz
d PaidDate 10a
d Status 16a

When I test the web service, the resulting XML is pretty close to perfect, except that I need to find a way to restrict the output from including all the "empty" array rows. For the "Set2" stuff, I get XML for all 32 rows, when only 2 rows are used:

...<PHONESCOUNT>2</PHONESCOUNT>
<PHONE>
<PHONENUMBER>5290001</PHONENUMBER>
<AMTDUE>25.11</AMTDUE>
<BANKROUTING>987654321</BANKROUTING>
<BANKACCOUNT>1234567890</BANKACCOUNT>
</PHONE>
<PHONE>
<PHONENUMBER>5290002</PHONENUMBER>
<AMTDUE>50.05</AMTDUE>
<BANKROUTING>456987123</BANKROUTING>
<BANKACCOUNT>98745612</BANKACCOUNT>
</PHONE>
<PHONE>
<PHONENUMBER>0</PHONENUMBER>
<AMTDUE>0.00</AMTDUE>
<BANKROUTING>0</BANKROUTING>
<BANKACCOUNT></BANKACCOUNT>
</PHONE>
<PHONE>
<PHONENUMBER>0</PHONENUMBER>
<AMTDUE>0.00</AMTDUE>
<BANKROUTING>0</BANKROUTING>
<BANKACCOUNT></BANKACCOUNT>
</PHONE>
<PHONE>
<PHONENUMBER>0</PHONENUMBER>
<AMTDUE>0.00</AMTDUE>
<BANKROUTING>0</BANKROUTING>
<BANKACCOUNT></BANKACCOUNT>
</PHONE>
<PHONE>
<PHONENUMBER>0</PHONENUMBER>
<AMTDUE>0.00</AMTDUE>
<BANKROUTING>0</BANKROUTING>
<BANKACCOUNT></BANKACCOUNT>
</PHONE>
<PHONE>
<PHONENUMBER>0</PHONENUMBER>
... [for all 32 rows. Same issue with the <Payment> array for 16 rows.]

If my output was a single array, my understanding is that I might have an opportunity in the wizard to define the output structure count to be a run-time variable instead of the dim default. My output, as a "structure of structures" does not appear to allow me any chance at fixing the counts.

Is there a way to specify PhonesCount and PaymentsCount someplace as the runtime values of array rows to return?

Many thanks.

Michael Koester
Programmer/Analyst