do not treate default_prefix as CURIE prefix for URIs. Fixes #1041

linkml_runtime/dumpers/rdflib_dumper.py

@@ -4,6 +4,7 @@
 from typing import Optional, Any, Dict, Union
 from pydantic import BaseModel
 
+import rdflib
 from curies import Converter
 from rdflib import Graph, URIRef, XSD
 from rdflib.term import Node, BNode, Literal

linkml_runtime/utils/schemaview.py

@@ -113,9 +113,6 @@ class SchemaView(object):
 
     This class utilizes caching for efficient lookup operations.
 
-    TODO: decide how to use this in conjunction with the existing schemaloader, which injects
-    into the schema rather than providing dynamic methods.
-
     See:
      - https://github.com/linkml/linkml/issues/59
      - https://github.com/linkml/linkml/discussions/144
@@ -934,15 +931,19 @@ def get_uri(self, element: Union[ElementName, Element], imports=True, expand=Fal
                 logging.warning(f'from_schema not populated for element {e.name}')
                 schema = self.schema_map[self.in_schema(e.name)]
             pfx = schema.default_prefix
-            uri = f'{pfx}:{e_name}'
+            if pfx in self.namespaces():
+                uri = f'{pfx}:{e_name}'
+            else:
+                uri = f'{pfx}{e_name}'
         if expand:
             return self.expand_curie(uri)
         else:
             return uri
 
     def expand_curie(self, uri: str) -> str:
         """
-        Expands a URI or CURIE to a full URI
+        Expands a URI or CURIE to a full URI.
+
         :param uri:
         :return: URI as a string
         """

tests/test_issues/input/linkml_issue_1041.yaml

@@ -0,0 +1,16 @@
+id: https://w3id.org/linkml/examples/personinfo
+name: personinfo
+prefixes:
+  linkml: https://w3id.org/linkml/
+imports:
+  - linkml:types
+default_range: string
+
+classes:
+  Person:
+    attributes:
+      id:  ## note: default range is string, NOT an identifier
+      full_name:
+      aliases:
+      phone:
+      age:

tests/test_issues/test_linkml_issue_1041.py

@@ -0,0 +1,30 @@
+from unittest import TestCase
+
+from rdflib import RDF, URIRef
+
+from linkml_runtime.dumpers import rdflib_dumper
+from linkml_runtime.utils.schemaview import SchemaView
+
+from tests.test_issues.environment import env
+from tests.test_issues.models.linkml_issue_1041 import Person
+
+
+class Issue1041TestCase(TestCase):
+    """
+    https://github.com/linkml/linkml/issues/1041
+    """
+    env = env
+
+    def test_issue_default_prefix(self):
+        view = SchemaView(env.input_path('linkml_issue_1041.yaml'))
+        uri = view.get_uri(view.get_class("Person"), expand=True)
+        person_uri = "https://w3id.org/linkml/examples/personinfo/Person"
+        self.assertEqual(uri, person_uri)
+        p = Person(id="ORCID:1234", full_name="Clark Kent", age="32", phone="555-555-5555")
+        g = rdflib_dumper.as_rdf_graph(p, view)
+        bnodes = g.subjects(RDF.type, URIRef(person_uri))
+        self.assertEqual(1, len(list(bnodes)))
+
+
+if __name__ == "__main__":
+    unittest.main()