--------------------------------------------
\begin{enumerate}
  \item<2-> text
  \item<3-> text
  \item<4-> text
  \item<5-> text
\end{enumerate}

- the successive items get uncovered (and remain visible) on 
  the slides 2 through 5 of the frame

--------------------------------------------
\begin{itemize}[<+->]
  \item text
  \item text
  \item text
\end{itemize}

- items get uncovered (and remain visible) on successive slides 
  1 through 3 of the frame (essentially the same as above but
  the successive items appear on the successive slides)

--------------------------------------------
\begin{itemize}
  \item <1-| alert@1> no SM Higgs
  \item <1-| alert@2> Higgs-like light fundamental particles (SUSY,...)
  \item <1-| alert@3> ESB triggered by a new strong sector (Technicolor,...)
\end{itemize}

- all items are visible from the first slide on
- items are put in red on successive slides 1 through 3, one at a time

--------------------------------------------
\begin{itemize}[<+->]
  \item<1-> text
            \begin{itemize}
              \item<1-> text
              \item<1-> text
              \item<1-> text
            \end{itemize}
  \item<2-> text
            \begin{itemize}
              \item<2-> text
            \end{itemize}
  \item<3-> text
            \begin{itemize}
              \item<3-> text
              \item<3-> text
              \end{itemize}
\end{itemize}

- items get uncovered (and remain visible) on successive slides 
  1 through 3 of the frame including all corresponding sublists
- it might be not the most effective way of reaching this effect but it works