The IPTC provides examples using EventsML-G2, they can be found in the "examples" folder on the IPTC web server:
Further we have created a web form which lets you input data for an event and upon clicking a button it creates the corresponding EventsML-G2 XML instantly.
Go to the page an try it yourself.
Version 2.12 - published in November 2012
See the Specification and Documentation tabs in the navigation bar on the top of this page to download the latest files.