lacks_part It was used in this ontology as: B.abortus S19 vaccine, lacks C terminal part of EryC protien, so B. abortus S19 lacks_part Brucella EryC protein The generation of this relation was inspired by W. Ceusters et al in 'Negative findings in electronic health records and biomedical ontologies: a realist approach' published in Int J Med Inform,76 Suppl 3, S326-33, 2007/03/21. After talking to W. Ceusters and getting help from other experts, the definition of this relation is updated and follows the instruction provided in the paper: Hoehndorf R, Oellrich A, Dumontier M, Kelso J, Rebholz-Schuhmann D, Herre H. Relations as patterns: bridging the gap between OBO and OWL. BMC Bioinformatics. 2010 Aug 31;11:441. doi: 10.1186/1471-2105-11-441. PMID: 20807438. The object property lacks_part represents a relation between instances of two classes; specifically, the meaning of X lacks-part Y is that all instances of X have no instance of Y as part: ?X subClassOf: not has-part some ?Y. YL, YH Hoehndorf R, Oellrich A, Dumontier M, Kelso J, Rebholz-Schuhmann D, Herre H. Relations as patterns: bridging the gap between OBO and OWL. BMC Bioinformatics. 2010 Aug 31;11:441. doi: 10.1186/1471-2105-11-441. PMID: 20807438.