<p>We describe the application of decision support systems to conflict modeling for identification of information operations. An information operation is treated as a complex weakly structured system. The paper presents a model of conflict between two subjects, based on the second-order reflexive model and a method for construction of the design pattern for knowledge bases of decision support systems. The authors suggest also a methodology allowing to use decision support systems for modeling of conflicts during information operations recognition. The methodology combines the use of expert knowledge and content monitoring data.</p><p>This paper is included in the program of <a href="https://digilience.org">DIGILIENCE 2019</a> and will be published in the post-conference volume.</p>