The mediaFileFormatsType simpleType provides a list of commonly used media formats.
token
      <simpleType name="mediaFileFormatsType" >
  <restriction base="token">
    <enumeration value="asx" />
    <enumeration value="bmp" />
    <enumeration value="eps" />
    <enumeration value="flash" />
    <enumeration value="gif" />
    <enumeration value="png" />
    <enumeration value="jpeg" />
    <enumeration value="shockwave" />
    <enumeration value="quicktime" />
    <enumeration value="wma" />
    <enumeration value="wmf" />
    <enumeration value="mpeg" />
    <enumeration value="mp3" />
    <enumeration value="other" />
  </restriction>
</simpleType>