It'll be a little while before the first hip-hop acts are eligible for induction into the Rock and Roll Hall of Fame (artists must have released a record 25 years prior in order to be considered), but KRS-One, Chuck D, Kurtis Blow, Melle Mel, and Big Daddy Kane will help honor the genre at a special conference in Cleveland next month being co-sponsored by the Rock Hall.In conjunction with Cleveland State University's Black Studies Program and Levi's, the Rock Hall will present "Hip-Hop: A Cultural Expression" at the Cleveland State campus from September 10-12. The three-day conference will open with a keynote address by former Boogie Down Productions leader KRS-One, with Public Enemy frontman Chuck D set to give the keynote speech on the conference's second day. Others slated to appear at the conference and contribute to various lectures and symposiums include such hip-hop talents as Kool G Rap, Prince Paul, Biz Markie, Mixmaster Mike, the X-ecutioners, Roxanne Shante, Marley Marl, DJ Kool Herc, and Rakim. The conference will also feature such seminal breakdancing acts as Den Swift and Joe Joe of the Rock Steady Crew, graffiti writers Phase 2, Vulcan, Mare 139, and music journalists Greg Tate, Alan Light, Kevin Powell, and Harry Allen. The weekend seminar will set the stage for a large exhibit, titled "Roots, Rhymes & Rage: The Hip-Hop Story," to open at the Rock and Roll Hall of Fame on November 11. That exhibit will take a look at the growth of hip-hop via mementos and items from many of the genre's luminaries, as well as some of the artist's personal effects and studio equipment.