Complex sentence: The DMCA's principal innovation in the field of copyright, the exemption from direct and indirect liability of internet service providers and other intermediaries, was adopted by the European Union in the Electronic Commerce Directive 2000.
Split into simpler sentences: The DMCA's principal innovation in the field of copyright is the exemption from direct and indirect liability of internet service providers and other intermediaries. This exemption was adopted by the European Union in the Electronic Commerce Directive 2000.