RMI legal data types

From the J2EE 1.4 tutorial:"If the bean allows remote access, the arguments must be legal types for the Java Remote Method Invocation (Java RMI) API."What are those types? I can't find them anywhere.Thank you.
[238 byte] By [Pavel_Ya] at [2007-10-3 4:49:07]
# 1
Anything that is Serializable or Externalizable, or any primitive type, or anything that is an exported remote object.
ejpa at 2007-7-14 22:53:37 > top of Java-index,Core,Core APIs...
# 2
Thanks, ejp.Just one question: What's an exported remote object?
Pavel_Ya at 2007-7-14 22:53:37 > top of Java-index,Core,Core APIs...
# 3
It is just another remote object that is part of the RMI system.Unlike serializable objects, only a reference to such object is passed.
genadya at 2007-7-14 22:53:37 > top of Java-index,Core,Core APIs...