Data frame used by the rtfStyleSheet function that describes the styles for the report.
The columns in the data frame are:
name - used for the style name and used by getStyleText
styleNumTxt - text number that identifies the style (\\s2)
styleBasedOn - numeric value that determines the style this style is based on
snextNum - numeric value that determines the next style number
styleText - text description in RTF tags for the style