A Clear Need

Itunes is incredibly versatile, but there are two features that it clearly lacks.  The first is hierarchal classification.  Currently, only one genera can be set for a song at a time, so that my Irish punk is outside the realm of punk which is outside the realm of rock, although each is clearly a subset of the other.  The solution is to currently create smart playlists by adding either additional tags or by grouping generas.  Instead, what should be done is allow one to put multiple generas and to stack them.  Eg.  Rock (hard rock (punk (irish punk))).  This information would be set for all songs downloaded and can be added for songs illegally downloaded.  

In this strain of adding metadata to files, written material that one can download such as periodicals or scanned books, should have the metadata that is already known included in a universally agreed set of categories the same way music is.  Much of this information is already available and is used by on-line bookstores, search engines and cross reference sites to find the article.  The only difference is that the data should be downloaded with the file in the same way that data is included with Itunes files, so that they can be easily managed at home.