Here, the main features of the common blocks used in GEANT are summarised, with special mention of the variables initialised in GINIT and of the possibility of overriding them through data records [BASE040] or interactive commands [XINT]. In most of the cases there is a correspondence between a given data structure and a given common block where the current contents of the banks are stored. The labelled common blocks are accessible through Patchy/CMZ sequences identified by the name of the COMMON. They are defined in the Patch GCDES.
Note:
Unless otherwise specified, the long range variables are initialised in GINIT. When non-zero, default values are quoted between brackets. If the value may be modified the keyword for the data record and for the interactive command is also given in bold characters between brackets.