\documentclass{article}
\begin{document}
\begin{table}
\centering
\caption{Logic Grammar for Dimensional Consistency}
\label{tab:rscsg}       % Give a unique label
\begin{tabular}{lll|lll}  
Exp($\vec{d}$) & $\rightarrow$ & Trm($\vec{d}$) & 
	Trm($\vec{d_1 \oplus d_2}$) & $\rightarrow$ & Trm($\vec{d_1}$) Mul Trm($\vec{d_2}$)  \\
Exp($\vec{d}$) & $\rightarrow$ & Trm($\vec{d}$) Add Trm($\vec{d}$)  & 
	Trm($\vec{d}$) & $\rightarrow$ & Var($\vec{d}$)  \\
& &  & 
	Trm(0) & $\rightarrow$ & Const\\
& & & & & \\
Add & $\rightarrow$ & "+" \textbar "-" &
	Mul & $\rightarrow$ & "*" \textbar "/"\\ 
Var(1,2,-2) & $\rightarrow$ & "T" &
	Var(0,2,0) & $\rightarrow$ & "V" \\
\end{tabular}
\end{table}
\end{document}