Methods and compositions for stimulating of the production of hydrocarbons from subterranean formations are provided. Thus, methods and compositions are provided herein that are useful for high-throughput functional analysis of complex, transcriptionally regulated physiological pathways. The categorization of the documents is based on n-grams, which are used to determine significant features of the documents. This is done based on a simple operation or request executed from the terminal with low display capacity. Related data tables may be linked through an intermediate linking table having a field containing a concatenated identification code corresponding to each student identification code and linked to another related data table.