Beamline definitions

A beamline is a list of elements, which can include other beamlines.

         label: line=(member1, member2, member3,.....)

denotes a beamline called label. The members can be elements, other beamlines, sequences of members, or any of the above preceeded by a repetition count and/or a minus sign for reflection.

Examples:


df:line = (dq, oo, b, oo qf) 


fdstar:line = (qf, sf, b, sd, qd) 


arc:line = (df, 64*(fdstar,df)) 

Beamlines can also have formal arguments. An example is

           fdstar(sf,sd):line = (qf, sf, b, sd, qd)

where sf and sd are not defined elements, but variables. So

           super:line = (fdstar(sd1,sf1),df,fdstar(sd2,sf2))

is a line in which the elements sd1, sd2, sf1, and sf2 are substituted for the variables sd and sf in the original definition.