The article offers a formal model of description of the compulsory encirclements of the lexical units, their semantic combinability, as well as the possible formation of diathesis. The structure of the presented dictionary article contains the following units: * A title word and part of speech * Classification of the word to a respective class * Meaning descriptively including the arguments * Information on every argument separately, including the following components: – Type of phrase – Explicity of the phrase – Syntactic function – Semantic signs of each argument – Prepositions in the preposition groups – Introductory connection for the relative clause –Other comments * Information on the admissible diathesis of the respective verb in the following order: – Type of diathesis – Examples The formal model has been implemented in the computer system Syntext (Syntactic lexicon Tool) which has the following basic merits: Linguistically independent system – SynText allows the inclusion of data from different languages, as the language-specific parameters and their measures, when necessary can easily be reformulated, added, removed, etc. Dynamic system – SynText allows fast and easy administration of the linguistic markers (the parameters and their measures) and it is fully configured and modified according to the needs of the examiners. Web-based system – the main advantage of Syntext is that we can work with it under different operation systems with minimal requirements to the parameters of the user’s computer. Informative-oriented system – the system allows the execution of different kinds of checks: extraction of words from one grammatical type, extraction of words by certain criteria, extraction of words with the same grammatical characteristics, etc.