Abstract.The meta-language of normal forms of knowledge is presented and its graphic and text descriptions are provided. The formal descriptions of numerous linguistic examples (including syntax of a subset of simple English sentences and the meta-language of extended Backus–Naur forms) are set out in text and graphic forms. It has been concluded that the meta-language presented can be favorably compared to human capabilities of knowledge representation and usage.

Keywords: : syntax, meta-language of Normal Forms of Knowledge, graphic tools of the meta-language, meta-language formal description, Extended Backus–Naur Form, syntax of English sentence.