Table 3: chem_comp_bond category: tokens in this section are looped through for each bond in the chemical component
Token	Definition	Example
_chem_comp_bond.comp_id	Same as _chem_comp.id	HYP
_chem_comp_bond.atom_id_1	The ID of the first of the two atoms that define the bond.	N
_chem_comp_bond.atom_id_2	The ID of the second of the two atoms that define the bond.	CA
_chem_comp_bond.value_order	The bond order of the chemical bond associated with the specified atoms.	SING
_chem_comp_bond.pdbx_aromatic_flag	Defines aromatic bonds.	Y or N
_chem_comp_bond.pdbx_stereo_config	Defines stereochemical bonds.	Y or N
_chem_comp_bond.pdbx_ordinal	Ordinal index for the component bond list.	1 (integer)