XmlmmCIF equivalent: chem_comp_link Data items in the CHEM_COMP_LINK category give details about the linkages between chemical components. XmlmmCIF equivalent: chem_comp_link/details A description of special aspects of a linkage between chemical components in the structure. XmlmmCIF equivalent: chem_comp_link/type_comp_1 The type of the first of the two components joined by the linkage. This data item is a pointer to _chem_comp.type in the CHEM_COMP category. XmlmmCIF equivalent: chem_comp_link/type_comp_2 The type of the second of the two components joined by the linkage. This data item is a pointer to _chem_comp.type in the CHEM_COMP category. XmlmmCIF equivalent: chem_comp_link/link_id This data item is a pointer to _chem_link.id in the CHEM_LINK category.