What is a DataVO pattern?

While looking at some open source code to learn more about J2EE, I came across classe开发者_运维问答s (or packages) named DataVO. In the code I looked at, this was simply serialized XML used by other classes.

What is the DataVO pattern exactly? and how does it differ from Data access object or Data transfer object?

Thanks!

For a while DTO and VO were the same thing. Basically a record structure with getters and setters, no real objectness to it.