5. The method as set forth in claim 3, wherein, if said current retrieval does not result in said selection hit, said previously selected predictive annotation in said previously retrieved predictive annotation vector in said predictive annotation storage structure is corrected in said previously recorded predictive annotation correcting step to predict a vector position corresponding to said chosen data block's vector position in said currently retrieved data vector.
6. The method as set forth in claim 5, wherein, said currently recorded predictive annotation is corrected in said currently recorded predictive annotation correcting step to predict a vector position corresponding to said chosen data block's vector position in said currently retrieved data vector; and said chosen predictive annotation in said chosen predictive annotation correcting step is also corrected to predict a vector position corresponding to said chosen data block's vector position in said currently retrieved data vector.