Thus music should be considered a supplement and not the primary description of an object. Furthermore music might provoke different feelings in different contexts. Meta information might be implemented as simple keywords or can be used to provide a visual and aural search utility to find relationships and similarities. Meta information might be accessible by the user or can be hidden and automatically generated and updated. Furthermore meta information might hold unrelated data about the object such as author, date of creation, copyright information and so on.
Meta information is essential to distinguish between several representations in the same media type.
Not only can these representations be sorted, but also provide a selection mechanism for user preferences. Most cases combine audio and video types into one media type, such as Quicktime, MPEG, Shockwave, Flash, RealVideo. Sometimes it is hard to find a way to describe a word, but it is almost always possible to give concrete examples of situations or objects this word refers to. The story might even show that hobbies may cost money, but that it is a pleasure to have hobbies.