OPD-CA-2, the multiaxial diagnostic system for psychodynamically oriented psychiatrists and therapists, now for children and adolescents. Following the success of the Operationalized Psychodynamic Diagnosis for Adults (OPD-2), this multiaxial diagnostic and classification system based on psychodynamic principles has now been adapted for children and adolescents by combining psychodynamic, developmental, and clinical psychiatric perspectives. The OPD-CA-2 is based on four axes that are aligned with the new dimensional approach in the DSM-5: I = interpersonal relations, II = conflict, III = structure, and IV = prerequisites for treatment. After an initial interview, the clinician (or researcher) can evaluate the patient's psychodynamics according to these axes to get a comprehensive psychodynamic view of the patient. Easy-to-use checklists and evaluation forms are provided. The set of tools and procedures the OPD-CA-2 manual provides have been widely used for assessing indications for therapy, treatment planning, and measuring change, as well as providing information for parental work.