systematics

noun4

1. •
   The study of classification systems and nomenclature.
2. •
   The classification system of a branch of science, especially the classification of organisms in biology.
3. •
   A branch of Christian theology that formulates an orderly, rational, and coherent account of Christian beliefs. It comprises dogmatics, ethics and philosophy of religion.

   • Systematics is an effort to understand those specifically theological affirmations that the theologian holds to be true and so regards as doctrines. — 1990
4. •
   The place where legal provisions stand as relevant for their interpretation.