textproc/libixion 0.19.0_4 DragonFly

Ixion is a library for calculating the results of formula expressions stored in multiple fomrula cells. The cells can be referenced by each other, and Ixion resolves their dependencies automatically upon calculation. Ixion also supports re-calculations where the contents of one or more cells have been modified since the last calculation, and a partial calculation of only the affected cells need to be calculated.