Hello all, I am trying to run through the GATK pipeline on the Galaxy Test page. I have a question related to the UnifiedGenotyper wrapper page. At the bottom of the page, I choose the "Advanced" tab for "Basic or Advanced Analysis options." After the automatically refreshed, I choose the "Annotation Types" that I was interested in. Then below that are options for "Annotation Interfaces/Groups:" What are these options used for? I have looked all over the web, on the GATK wiki and at the GATK Q&A page (located at getsatisaction.com) without any luck. Are these options important? The description located at the bottom of the page lists: Group - One or more classes/groups of annotations to apply to variant calls. What type of group or class is "Standard", "Experiments" or "WorkInProgress?" Does "class" refer to a Java "class" in a similar way that annotations are "arguments?" Any clarification would be very helpful. Thanks, Mike