There are two types of extractor . They are
2)Custom / Generic Extractor.
1)Standard Extractor : are the extractor which are already created by SAP which in present in R/3 in Tcode : RSA5 . and that datasource will be in the DELIVERED VERSION(D) , to convert it to the active version ,U have to activate in RSA5 .
2)Custom / Generic Extractor : are the extractor which are created by us using Tcode : RSO2