How does chloride of lime differ chemically from calcium chloride?

(N/A) Chloride of lime,commonly known as bleaching powder,has the chemical formula $CaOCl_{2}$ (calcium oxychloride).
In contrast,calcium chloride has the chemical formula $CaCl_{2}$.
Chemically,chloride of lime contains an oxygen atom bonded to calcium and chlorine,whereas calcium chloride is a simple salt of calcium and chlorine.