An Overview of the $b$-Tagging Algorithms in the CMS Offline Software

The CMS Offline software contains a widespread set of algorithms to identify jets originating from the weak decay of $b$~quarks. Different physical properties of B~hadron decays like lifetime information, secondary vertices and soft leptons are exploited. The variety of selection algorithms range from simple and robust ones, suitable for early data-taking and online environments as the trigger system, to highly discriminating ones, exploiting all the information available. For the latter, a generic discriminator computing framework has been developed that allows to exploit the full power of multi-variate analysis techniques in a flexible way.