This paper presents the features of text categorization of commercial content in linguistic modelling. Description of syntax sentence modelling is applied to automate the processes of analysis and synthesis of texts in natural language for commercial content categorization. This article suggests methods of content analysis for online newspaper. The model describes the processing of information resources systems of content analysis and simplifies the technology of content management system automation. General problems of syntactical and semantic content analysis and functional services of content management system are analysed.