An apparatus for rendering a digital content having license information defining specifics of permission of a rendering operation includes a license processor that acquires, from the license information of the digital content, a constraint defining conditions for rendering between the digital content and other digital content; an operation execution command generator that generates an operation execution command for rendering the digital content according to the constraint acquired by the license processor; and a content renderer that renders the digital content based on the operation execution command generated by the operation execution command generator.