What are the types of enzyme specificity?

What are the four types of enzyme specificity:

1. Absolute specificity – An enzyme is said to have absolute specificity when it catalyzes only one substrate and reaction.
2. Group specificity – If an enzyme acts only on molecules that possess specific functional groups such as amino, phosphate, and methyl groups, it has group specificity.
3. Linkage specificity – If an enzyme acts on a specific type of chemical bond regardless of the remaining molecular structure, it has linkage specificity. 
4. Stereochemical specificity – An enzyme that acts on a certain optical or steric isomer has stereochemical specificity.