This article analyzes the publications concerning the topic of legal ontology as supporting processes and activities of legal nature. A systematic review of the theme and the identification of the main existing studies are carried out. This review is developed throughout three tasks: contextualization of the theme from a legal perspective; systematic literature search; analysis and synthesis of the information obtained. From these studies the present work serves as a basis for the understanding and discussion of the possibilities of applying legal ontologies to support the activities of the legislative process in the parliamentary scope, and also the judicial process. Furthermore, it is intended in the future the definition of a legal domain-specific language. This article also presents the mapping of the publications of this theme with the existing studies and presents the respective critical and comparative analysis.