21st-century classical music is art music, in the contemporary classical tradition, that has been produced since the year 2000. Some elements of the previous century have been retained, including postmodernism, polystylism and eclecticism, which seek to incorporate elements of all styles of music irrespective of whether these are "classical" or not—these efforts represent a slackening differentiation between the various musical genres. Important influences include rock, pop, jazz and the dance traditions associated with these. The combination of classical music and multimedia is another notable practice in the 21st century; the Internet, alongside its related technology, are important resources in this respect. Attitudes towards female composers are also changing.