We compare two projects: the ideographic description of Russian phraseology in the «Thesaurus of Russian idioms» [Baranov, Dobrovolsky 2007], on the one hand, and “The Russian Constructicon” (https://constructicon.github.io/russian/), a joint project of the research group CLEAR (UiT The Arctic University of Norway) and School of Linguistics (NRU HSE), on the other hand. Both resources describe non-compositional expressions in Russian, suggesting a semantic classifi cation of linguistic units. However, these resources have diff erent objectives and are prototypically focused on diff erent types of linguistic units. As shown in this study, they are built on diff erent principles and do not duplicate each other. A consistent comparison of the Thesaurus with “The Russian Constructicon” facilitates the functional classifi cation of phraseological units proposed in the theoretical papers of A. N. Baranov and D. O. Dobrovolsky from a new perspective. By promoting and clarifying this classifi cation, this article focuses on the relationships between specifi c classes of idioms, and their quantitative assessment.