schema-URIs with plain name identifiers cannot have derived sub-schema-URIs

fix #96

src/json-validator.cpp

@@ -1118,6 +1118,13 @@ std::shared_ptr<schema> schema::make(json &schema,
                                      const std::vector<std::string> &keys,
                                      std::vector<nlohmann::json_uri> uris)
 {
+	// remove URIs which contain plain name identifiers, as sub-schemas cannot be referenced
+	for (auto uri = uris.begin(); uri != uris.end();)
+		if (uri->identifier() != "")
+			uri = uris.erase(uri);
+		else
+			uri++;
+
 	// append to all URIs the keys for this sub-schema
 	for (auto &key : keys)
 		for (auto &uri : uris)

test/issue-96/CMakeLists.txt

@@ -0,0 +1,6 @@
+add_test_simple_schema(Issue::96
+                       ${CMAKE_CURRENT_SOURCE_DIR}/schema.json
+                       ${CMAKE_CURRENT_SOURCE_DIR}/instance.json)
+set_tests_properties(Issue::96
+                     PROPERTIES
+                     WILL_FAIL 1)

test/issue-96/instance.json

@@ -0,0 +1 @@
+{"top": {"value": 101}}

test/issue-96/schema.json

@@ -0,0 +1,23 @@
+{
+    "$id": "http://xxx.local/schemas/mySchema.json",
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "definitions": {
+        "topDef": {
+            "$id": "#topDef_ref",
+            "type": "object",
+            "properties": {
+                "value": {
+                    "type": "integer",
+                    "maximum": 100
+                }
+            }
+        }
+    },
+
+    "type": "object",
+    "properties": {
+        "top": {
+            "$ref": "#/definitions/topDef"
+        }
+    }
+}