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-rw-r--r--dump/triples.scm6
1 files changed, 4 insertions, 2 deletions
diff --git a/dump/triples.scm b/dump/triples.scm
index 5bd1ed1..11e6d75 100644
--- a/dump/triples.scm
+++ b/dump/triples.scm
@@ -24,8 +24,10 @@ characters with an underscore and prefixing with gn:PREFIX."
(format #t "@prefix ~a ~a .~%" prefix iri))
(define (ontology prefix value)
- (string->symbol
- `,(format #f "~a~a" prefix value)))
+ (if (and (string? value) (string-null? value))
+ ""
+ (string->symbol
+ `,(format #f "~a~a" prefix value))))
(define (triple subject predicate object)
(unless (or (string? subject)