The BTK Atom Concept
 The BTK AtomIterable Concept
 The BTK AtomIterator Concept
 The BTK AtomicStructure Concept
 The BTK MutableAtomicStructure Concept
 The BTK StrictlyChemicallyTyped Concept
 The BTK ChemicallyTyped Concept
To be documented:
btk_container_concept
 chain_concept
 chain_iterable_concept
 chain_iterator_concept
 monomer_concept
 monomer_iterable_concept
 monomer_iterator_concept
 polymer_structure_concept
 system_concept
 type_id_concept
 type_system_concept
 
 1.5.1
 1.5.1