Is it possible to define a pattern and reuse it to capture multiple groups?

by

To reuse a pattern, you could use (?n) where n is the number of the group to repeat. For example, your actual pattern :

(PAT),(PAT), ... ,(PAT)

can be replaced by:

(PAT),(?1), ... ,(?1)

(?1) is the same pattern as (PAT)whatever PAT is.

You may have multiple patterns:

(PAT1),(PAT2),(PAT1),(PAT2),(PAT1),(PAT2),(PAT1),(PAT2)

may be reduced to:

(PAT1),(PAT2),(?1),(?2),(?1),(?2),(?1),(?2)

or:

((PAT1),(PAT2)),(?1),(?1),(?1)

or: 

((PAT1),(PAT2)),(?1){3}

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