RXNO is a case of an ontology which uses the AnnotationProperty: database_cross_reference (IRI: http://www.geneontology.org/formats/oboInOwl#hasDbXref) to reference external references to a entity. As the following example show with RXNO:0000138 (benzoin condensation)
And under the OLS API database_cross_reference appears under the key obo_xref as in the following query to RXNO:0000138
{
"iri" : "http://purl.obolibrary.org/obo/RXNO_0000138",
"label" : "benzoin condensation",
"description" : [ "A reaction between two aromatic aldehydes to give a benzoin (an alpha-hydroxyketone)." ],
"annotation" : {
"database_cross_reference" : [ "https://www.wikidata.org/wiki/Q818514", "https://www.rsc.org/Merck-Index/reaction/r35/" ],
"has_obo_namespace" : [ "RXNO" ],
"id" : [ "RXNO:0000138" ]
},
"synonyms" : [ "benzoin addition" ],
"ontology_name" : "rxno",
"ontology_prefix" : "RXNO",
"ontology_iri" : "http://purl.obolibrary.org/obo/rxno.obo.owl",
"is_obsolete" : false,
"term_replaced_by" : null,
"is_defining_ontology" : true,
"has_children" : false,
"is_root" : false,
"short_form" : "RXNO_0000138",
"obo_id" : "RXNO:0000138",
"in_subset" : null,
"obo_definition_citation" : [{"definition":"A reaction between two aromatic aldehydes to give a benzoin (an alpha-hydroxyketone).",
"oboXrefs":[{"database":null,"id":"https://orcid.org/0000-0002-4077-4719","description":null,"url":"https://orcid.org/0000-0002-4077-4719"},{"database":"RSC","id":"db","description":null,"url":null}]}],
"obo_xref" : [
{"database":null,"id":"https://www.rsc.org/Merck-Index/reaction/r35/","description":null,"url":"https://www.rsc.org/Merck-Index/reaction/r35/"}, {"database":null,"id":"https://www.wikidata.org/wiki/Q818514","description":null,"url":"https://www.wikidata.org/wiki/Q818514"}],
"obo_synonym" : null,
"is_preferred_root" : false,
}
}It would in interesting to create an example where RXNO named reactions classes which contain oboXrefs to wikidata could be used to pull more information on reactions from Wikidata via a SPARQL Query
@StroemPhi@okoepler@sneumann
RXNO is a case of an ontology which uses the AnnotationProperty: database_cross_reference (IRI: http://www.geneontology.org/formats/oboInOwl#hasDbXref) to reference external references to a entity. As the following example show with RXNO:0000138 (benzoin condensation)
And under the OLS API
database_cross_referenceappears under the keyobo_xrefas in the following query to RXNO:0000138{ "iri" : "http://purl.obolibrary.org/obo/RXNO_0000138", "label" : "benzoin condensation", "description" : [ "A reaction between two aromatic aldehydes to give a benzoin (an alpha-hydroxyketone)." ], "annotation" : { "database_cross_reference" : [ "https://www.wikidata.org/wiki/Q818514", "https://www.rsc.org/Merck-Index/reaction/r35/" ], "has_obo_namespace" : [ "RXNO" ], "id" : [ "RXNO:0000138" ] }, "synonyms" : [ "benzoin addition" ], "ontology_name" : "rxno", "ontology_prefix" : "RXNO", "ontology_iri" : "http://purl.obolibrary.org/obo/rxno.obo.owl", "is_obsolete" : false, "term_replaced_by" : null, "is_defining_ontology" : true, "has_children" : false, "is_root" : false, "short_form" : "RXNO_0000138", "obo_id" : "RXNO:0000138", "in_subset" : null, "obo_definition_citation" : [{"definition":"A reaction between two aromatic aldehydes to give a benzoin (an alpha-hydroxyketone).", "oboXrefs":[{"database":null,"id":"https://orcid.org/0000-0002-4077-4719","description":null,"url":"https://orcid.org/0000-0002-4077-4719"},{"database":"RSC","id":"db","description":null,"url":null}]}], "obo_xref" : [ {"database":null,"id":"https://www.rsc.org/Merck-Index/reaction/r35/","description":null,"url":"https://www.rsc.org/Merck-Index/reaction/r35/"}, {"database":null,"id":"https://www.wikidata.org/wiki/Q818514","description":null,"url":"https://www.wikidata.org/wiki/Q818514"}], "obo_synonym" : null, "is_preferred_root" : false, } }It would in interesting to create an example where RXNO named reactions classes which contain
oboXrefsto wikidata could be used to pull more information on reactions from Wikidata via a SPARQL Query@StroemPhi@okoepler@sneumann