I am wondering what kind of table that is, is that perhaps a state table? I am not sure what \$q_1\$ and \$q_2\$ stand for. They don't look like next state functions since these are denoted \$q^+\$ in my book.
\$q_x\$ is most often the name of an output. Typically the output of gates or more complex circuit blocks.
Here the combination of the variables \$q_1\$ and \$q_2\$ and the state is bijunctive, so they are somehow equivalent to the state itself. The state seems to be altered by different input values of a circuit or gate as shown by the \$X/Y\$ notation at the branches of the diagram.