"Postmodernism is cultural movement that came after modernism, also it follows our shift from being a industrial society to that of an information society, through globalization of capital. Markers of the postmodern culture include opposing hierarchy, diversifying and recycling culture, questioning scientific reasoning, and embracing paradox. Postmodernism is a term applied to a wide-ranging set of developments in critical theory, philosophy, architecture, art, literature, and culture, which are generally characterized as either emerging from, in reaction to, or superseding modernism"
"Postmodern style is often characterized by eclecticism, digression, collage, pastiche, and irony. Postmodern theorists see postmodern art as a conflation or reversal of well-established modernist systems, such as the roles of artist versus audience, seriousness versus play, or high culture versus kitsch."
By R. Lee from Media Studies 180 Hunter College, Sections 102, 103
Of course, intertextual references are often found in post modern texts.