"Names a column in the parent table of a join" . "1"^^ . "1"^^ . . "select ?join as ?s, (\"Warning\") as ?severity,\n (if (bif:isnotnull (sql:R2RML_KEY_COLUMN_EXISTS (?ts, ?to, ?tn, ?col, 1)),\n bif:concat (\"rr:parent refers to column \", ?col , \" that is misspelled name of column \",\n sql:R2RML_KEY_COLUMN_EXISTS (?ts, ?to, ?tn, ?col, 1), \" that the table \",\n sql:R2RML_MAIN_KEY_EXISTS (?ts, ?to, ?tn, 0), \" contains now; adjust the R2RML or the table before generating an RDF View\" ),\n bif:concat (\"rr:parent refers to column \", ?col , \" that is not found in table \",\n sql:R2RML_MAIN_KEY_EXISTS (?ts, ?to, ?tn, 0), \"; adjust the R2RML or the table before generating an RDF View\" ) ) ) as ?message\n where {\n ?lt rr:tableName ?tn .\n OPTIONAL { ?lt rr:tableOwner ?to }\n OPTIONAL { ?lt rr:tableSchema ?ts }\n filter (bif:isnotnull (sql:R2RML_MAIN_KEY_EXISTS (?ts, ?to, ?tn, 0)))\n ?ptriplesmap a rr:TriplesMap ; rr:logicalTable ?lt .\n ?objmap rr:parentTriplesMap ?ptriplesmap ; rr:joinCondition ?join .\n ?join rr:parent ?col .\n filter (bif:isnull (sql:R2RML_KEY_COLUMN_EXISTS (?ts, ?to, ?tn, ?col, 0))) }" . . .