Metadata, MediaObjects in Visual Search Servlet on eVe SDK

[Testing123]

I'm working with the eVe Java SDK from

http://www.evisionglobal.com

for developing visual search engines.I'm a little confused about the visual search servlet. Let's say I want to find a specific sunset image. The VisualSearchServlet will create an instance of MediaCollection (which only has CollectionName as a property). The "open" method is used to load all images from the sunset category. Then, MediaCollection gets the identifiers from MediaObjects in the MediaCollection category. Here is my question: If MediaObjects has default properties, how can they be searched. In the eVe FAQ, it says that properties cannot be searched, only metadata. Where is the metadata in the MediaObject. Am I missing something obvious?