SAS Text Miner gives you the capability to perform both descriptive and predictive text mining. From my understanding SAS does this by first processing the data using %TMFILER macro which creates a SAS data set. The data set is used in the text ming node for text parsing and then transformed into a informative format. Then it is analyzed for predictive and descriptive purposes.
Text Mining is a very powerful tool and is well on its way to become a high demand software. The %TMFILTER macro is so powerful and useful especially with the support of several languages, the possibilities are endless.