diff --git a/case_utils/case_sparql_select/__init__.py b/case_utils/case_sparql_select/__init__.py
index b753664..dcc704e 100644
--- a/case_utils/case_sparql_select/__init__.py
+++ b/case_utils/case_sparql_select/__init__.py
@@ -70,6 +70,11 @@ def main() -> None:
         action="store_true",
         help="Raise error if no results are returned for query.",
     )
+    parser.add_argument(
+        "--use-prefixes",
+        action="store_true",
+        help="Abbreviate node IDs according to graph's encoded prefixes.  (This will use prefixes in the graph, not the query.)",
+    )
     parser.add_argument(
         "out_table",
         help="Expected extensions are .html for HTML tables or .md for Markdown tables.",
@@ -124,6 +129,11 @@ def main() -> None:
                 # The render to ASCII is in support of this script rendering results for website viewing.
                 # .decode() is because hexlify returns bytes.
                 column_value = binascii.hexlify(column.toPython()).decode()
+            elif isinstance(column, rdflib.URIRef):
+                if args.use_prefixes:
+                    column_value = graph.namespace_manager.qname(column.toPython())
+                else:
+                    column_value = column.toPython()
             else:
                 column_value = column.toPython()
             if row_no == 0:
diff --git a/tests/case_utils/case_sparql_select/.check-prefixed_results.html b/tests/case_utils/case_sparql_select/.check-prefixed_results.html
new file mode 100644
index 0000000..10e210b
--- /dev/null
+++ b/tests/case_utils/case_sparql_select/.check-prefixed_results.html
@@ -0,0 +1,18 @@
+<table border="1" class="dataframe table table-bordered table-condensed">
+  <thead>
+    <tr style="text-align: right;">
+      <th></th>
+      <th>?nFile</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <th>0</th>
+      <td>kb:file-1</td>
+    </tr>
+    <tr>
+      <th>1</th>
+      <td>kb:file-2</td>
+    </tr>
+  </tbody>
+</table>
\ No newline at end of file
diff --git a/tests/case_utils/case_sparql_select/.check-prefixed_results.md b/tests/case_utils/case_sparql_select/.check-prefixed_results.md
new file mode 100644
index 0000000..f49a624
--- /dev/null
+++ b/tests/case_utils/case_sparql_select/.check-prefixed_results.md
@@ -0,0 +1,4 @@
+|    | ?nFile    |
+|----|-----------|
+|  0 | kb:file-1 |
+|  1 | kb:file-2 |
\ No newline at end of file
diff --git a/tests/case_utils/case_sparql_select/Makefile b/tests/case_utils/case_sparql_select/Makefile
index 22a849b..6431be7 100644
--- a/tests/case_utils/case_sparql_select/Makefile
+++ b/tests/case_utils/case_sparql_select/Makefile
@@ -18,6 +18,8 @@ top_srcdir := $(shell cd ../../.. ; pwd)
 tests_srcdir := $(top_srcdir)/tests
 
 all: \
+  prefixed_results.html \
+  prefixed_results.md \
   subclass-explicit-none.md \
   subclass-implicit-any.md \
   w3-output.html \
@@ -31,14 +33,30 @@ all: \
   check-w3-markdown
 
 .PRECIOUS: \
+  prefixed_results.% \
   subclass-% \
   w3-output.%
 
 check: \
   check-w3-html \
   check-w3-markdown \
+  check-prefixed_results \
   check-subclass
 
+check-prefixed_results: \
+  check-prefixed_results-html \
+  check-prefixed_results-md
+
+check-prefixed_results-html: \
+  .check-prefixed_results.html \
+  prefixed_results.html
+	diff $^
+
+check-prefixed_results-md: \
+  .check-prefixed_results.md \
+  prefixed_results.md
+	diff $^
+
 check-subclass: \
   check-subclass-explicit-none \
   check-subclass-implicit-any
@@ -71,6 +89,21 @@ clean:
 	  *.md \
 	  _*
 
+prefixed_results.%: \
+  $(tests_srcdir)/.venv.done.log \
+  $(top_srcdir)/case_utils/case_sparql_select/__init__.py \
+  $(top_srcdir)/case_utils/ontology/__init__.py \
+  $(top_srcdir)/case_utils/ontology/version_info.py \
+  subclass.json \
+  subclass.sparql
+	source $(tests_srcdir)/venv/bin/activate \
+	  && case_sparql_select \
+	    --use-prefixes \
+	    _$@ \
+	    subclass.sparql \
+	    subclass.json
+	mv _$@ $@
+
 subclass-explicit-none.md: \
   $(tests_srcdir)/.venv.done.log \
   $(top_srcdir)/case_utils/case_sparql_select/__init__.py \
diff --git a/tests/case_utils/case_sparql_select/prefixed_results.html b/tests/case_utils/case_sparql_select/prefixed_results.html
new file mode 100644
index 0000000..10e210b
--- /dev/null
+++ b/tests/case_utils/case_sparql_select/prefixed_results.html
@@ -0,0 +1,18 @@
+<table border="1" class="dataframe table table-bordered table-condensed">
+  <thead>
+    <tr style="text-align: right;">
+      <th></th>
+      <th>?nFile</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <th>0</th>
+      <td>kb:file-1</td>
+    </tr>
+    <tr>
+      <th>1</th>
+      <td>kb:file-2</td>
+    </tr>
+  </tbody>
+</table>
\ No newline at end of file
diff --git a/tests/case_utils/case_sparql_select/prefixed_results.md b/tests/case_utils/case_sparql_select/prefixed_results.md
new file mode 100644
index 0000000..f49a624
--- /dev/null
+++ b/tests/case_utils/case_sparql_select/prefixed_results.md
@@ -0,0 +1,4 @@
+|    | ?nFile    |
+|----|-----------|
+|  0 | kb:file-1 |
+|  1 | kb:file-2 |
\ No newline at end of file