issue in WS based on FM with data declared as TABLES

Dear all,

I created enterprise WS with endpoint as function module. The FM has a date declared as TABLES. I see the table data under Output section of External and Internal view in SE80. Also the data is being exposed (check box set). However if I consume the WS either via ABAP consumer proxy or externally outside the SAP system (from JAVA app) the data which is declared as TABLES is not visible in RESPONSE from the WS.

Is this behavior feature? Shall I always declare (in case of custom FM) all the data as EXPORTING?

If so what about the SAP standard FMs? In this case do I need to always create custom Z* FM as wrapper?

thanks

m./