2005

16.08.2005

SENDER-SPECIFIC LEARNING

2001

16.08.2001

SELF-LEARNING CONTENT-BASED CLAS­SI­FI­CA­TION

2000

28.06.2000

TOP-DOWN SEARCH

1998

28.06.1998

FREE-FORM EXTRA­C­TION

1997

28.06.1997

LAYOUT-BASED CLAS­SI­FI­CA­TION