Digital objects have been rapidly emerging as pervasive beings in our daily life. As a consequence, we often need to keep these digital objects accessible and usable for a certain period of time, which, known as digital preservation, has become one of the most pressing demands in the communities of archives, libraries, and publishers. However, in the digital era long-term preservation poses novel challenges to these communities. Particularly, because the creation of digital materials develops in an explosive speed, the corresponding digital preservation activities need to have higher levels of efficiency and automation. This paper briefly introduces how the aforementioned digital preservation challenge is addressed by the PROTAGE system, which is being developed by an EU-funded FP7 project.