1 files changed, 2 insertions, 6 deletions
diff --git a/bsfs/triple_store/sparql/utils.py b/bsfs/triple_store/sparql/utils.py
index deca4d8..38062c2 100644
--- a/bsfs/triple_store/sparql/utils.py
+++ b/bsfs/triple_store/sparql/utils.py
@@ -1,9 +1,4 @@
-"""
 
-Part of the BlackStar filesystem (bsfs) module.
-A copy of the license is provided with the project.
-Author: Matthias Baumgartner, 2022
-"""
 # standard imports
 import typing
 
@@ -127,11 +122,12 @@ class Query():
         """Return an executable sparql query."""
         select = ' '.join(f'({head} as ?{name})' for head, name in self.select)
         return f'''
-            SELECT {self.root_head} {select}
+            SELECT DISTINCT {self.root_head} {select}
             WHERE {{
                 {self.root_head} <{ns.rdf.type}>/<{ns.rdfs.subClassOf}>* <{self.root_type}> .
                 {self.where}
             }}
+            ORDER BY str({self.root_head})
             '''
 
     def __call__(self, graph: rdflib.Graph) -> rdflib.query.Result: