Prefixes pre- and pri-: linguistic factors, codification criteria and modern edition of the rule (from materials of the academic description of Russian spelling)

The article is a fragment of the academic description spelling. It dedicated to spelling words with prefixes pre- and pri-. assertion that vowel determined by correct choice prefix or pri- disputed. This thesis true only for those meanings occur in stressed position. In other cases does not reflect systemic opposition morphemes, it historically conditioned. existing types this problem are compared. Two criteria used spelling: etymological semantic. semantic criterion can include different refer word. expediency building rule based on classification lexems, rather than prefixes, shown. restriction application "check rule" substantiated, when check allowed forms derivatives same reasons including unchecked considered. A version proposed reflects conditioned meets requirements an description.