diff --git a/src/cco-extensions/ModalRelationOntology.ttl b/src/cco-extensions/ModalRelationOntology.ttl
index 57a196c..1b28cf5 100644
--- a/src/cco-extensions/ModalRelationOntology.ttl
+++ b/src/cco-extensions/ModalRelationOntology.ttl
@@ -525,7 +525,7 @@ mro:BFO_0000195 rdf:type owl:ObjectProperty ;
                 <http://purl.org/dc/elements/1.1/identifier> "012-BFO" ;
                 rdfs:label "specifically depends on"@en ;
                 <http://www.w3.org/2004/02/skos/core#altLabel> "s-depends on"@en ;
-                <http://www.w3.org/2004/02/skos/core#definition> "(Elucidation) specifically depends on is a relation between a specifically dependent continuant b and specifically dependent continuant or independent continuant that is not a spatial region c such that b and c share no parts in common & b is of a nature such that at all times t it cannot exist unless c exists & b is not a boundary of c"@en ;
+                <http://www.w3.org/2004/02/skos/core#definition> "(Elucidation) x specifically_depends_on y iff x is an instance of Specifically Dependent Continuant and y is an instance of Specifically Dependent Continuant or Independent Continuant and is not an instance of Spatial Region and x and y share no parts in common & for all times x exists y exists & x is not a boundary of y."@en ;
                 <http://www.w3.org/2004/02/skos/core#example> "A shape specifically depends on the shaped object; hue, saturation and brightness of a colour sample specifically depends on each other"@en ;
                 <http://www.w3.org/2004/02/skos/core#scopeNote> "The analogue of specifically depends on for occurrents is has participant."@en .