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Short helpfile for action DOMAIN_DECOMPOSITION
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The following arguments are compulsory: 

                 NATOMS - the number of atoms across all the domains 
               PBCLABEL - ( default=Box ) the label to use for the PBC action that 
                          will be created 

In addition you may use the following options: 

  NUMERICAL_DERIVATIVES - ( default=off ) calculate the derivatives for these 
                          quantities numerically 
                  VALUE - value to create for the domain decomposition. You can use 
                          multiple instances of this keyword i.e. VALUE1, VALUE2, VALUE3... 
                   UNIT - unit of the ith value that is being passed through the 
                          domain decomposition. You can use multiple instances of this 
                          keyword i.e. UNIT1, UNIT2, UNIT3... 
               CONSTANT - is the ith value that is being passed through the domain 
                          decomposition constant. You can use multiple instances of this keyword 
                          i.e. CONSTANT1, CONSTANT2, CONSTANT3... 
               PERIODIC - if the value being passed to plumed is periodic then you 
                          should specify the periodicity of the function. If the value is 
                          not periodic you must state this using PERIODIC=NO. Positions 
                          are passed with PERIODIC=NO even though special methods are 
                          used to deal with pbc. You can use multiple instances of this 
                          keyword i.e. PERIODIC1, PERIODIC2, PERIODIC3... 
                   ROLE - Get the role this value plays in the code can be x/y/z/m/q 
                          to signify that this is x, y, z positions of atoms or masses 
                          or charges of atoms. You can use multiple instances of this 
                          keyword i.e. ROLE1, ROLE2, ROLE3... 


