5. The database system of claim 3 , wherein generating the subtotal topic score for the text sequence and the topic comprises: identifying a first data entry containing the text sequence and the topic; normalizing the text-to-topic association score of the identified first data entry and a total word score associated with the text sequence; dividing the normalized text-to-topic association score by a first function of the normalized total word score to generate an intermediate score; and dividing the intermediate score by a second function of the length of the incoming text to generate a subtotal topic score.
5. The database system of claim 3 , wherein generating the subtotal topic score for the text sequence and the topic comprises: identifying a first data entry containing the text sequence and the topic; normalizing the text-to-topic association score of the identified first data entry and a total word score associated with the text sequence; dividing the normalized text-to-topic association score by a first function of the normalized total word score to generate an intermediate score; and dividing the intermediate score by a second function of the length of the incoming text to generate a subtotal topic score. 6. The database system of claim 5 , wherein normalizing the text-to-topic association score and the total word score comprises: dividing the text-to-topic association score by an inflation factor; and dividing the total word score by the inflation factor.