Constant advances in information technology have led to changes regarding the genesis of the archival document, considered the object of study of archival science. With the emergence of the digital archival document, it was necessary to update theories to contemplate digital reality. New approaches have emerged, such as digital preservation, which uses structural and operational procedures to preserve digital documents. This article aims to carry out a study of encapsulation strategies, discussing their applicability in the collections, as well as its use in conjunction with other strategies. The method adopted here is a survey of previously published literature on the issue. Thus, the data collected is analyzed qualitatively. This study highlights the advantages and disadvantages of the strategies of encapsulation, pointing out gaps which could be resolved with the help of other strategies of digital preservation. Finally, it emphasizes greater approximation between activities of digital preservation and knowledge management, an issue that is little discussed in the context of preservation of digital archival documents.