Visual metalanguage for description of solution of diagnostic problems

The paper considers the idea of the visual metalanguage describing the solution of a diagnostic problem by a combination of several interconnected reasoning processes in different languages. The approach to reducing a diagnostic problem with cognitive visualization is also observed. The diagnostic problem is presented as a decomposition of elements of different types hierarchically arranged with horizontal connections. It includes domain diagnostic solution, diagnostic tasks and subtasks, diagnostic solutions-bundles and compensated difficulties. The axiomatic theory of role visual diagnostic models of functional hybrid intelligent diagnostic systems is based on the considered visual metalanguage. Such systems are the support systems for making diagnostic decisions with cognitive visualization of problems and obtaining an integrated image — the “state of human organs and systems.”