Zend_Soap : How to define return type struct in doc block?

Question

I have a Web service set up using Zend_Soap, and some public methods in that Web service. The fact is i want to return a complex type.

For instance, if i want to return a bidimensional array, like a rowset of a table how should i specify the doc block? This is one of my cases. I want to return an array each element having an int and two strings. Like:

[0] = {1 , NameA, StringA } [1] = {4 , NameB, StringB } [2] = {6 , NameC, StringC } [3] = {9 , NameD, StringD }

How can i achieve this? Then how can i make even more complex by, say, replace the 3rd field with another array of an int and a string?

TIA