From d7827fd1d336b8fbf5c25e25df158beb9587c6a5 Mon Sep 17 00:00:00 2001
From: pmcb55 <patm@inrupt.com>
Date: Mon, 2 Oct 2023 00:38:25 +0100
Subject: [PATCH] fix RDF and RDFS term IRIs

---
 CHANGELOG.md          |  2 ++
 src/VocabTerm.test.ts |  6 +++---
 src/VocabTerm.ts      | 20 ++++++++++----------
 3 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6af3bb6c..79aacc02 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ This project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html
 
 ## Unreleased
 
+- Fix RDF and RDFS term IRIs.
+
 ## 1.1.0 2023/10/01
 
 - Add the ability to retrieve all the RDF:type values for any vocab term.
diff --git a/src/VocabTerm.test.ts b/src/VocabTerm.test.ts
index f02bff95..2b0f6177 100755
--- a/src/VocabTerm.test.ts
+++ b/src/VocabTerm.test.ts
@@ -627,8 +627,8 @@ describe("VocabTerm tests", () => {
     });
 
     it("should handle rdf:type of Class", () => {
-      const RDF_CLASS = rdfFactory.namedNode(
-        "http://www.w3.org/1999/02/22-rdf-syntax-ns#Class",
+      const RDFS_CLASS = rdfFactory.namedNode(
+        "http://www.w3.org/2000/01/rdf-schema#Class",
       );
       const myTerm = buildBasicTerm(
         "http://some.vocab#myTerm",
@@ -637,7 +637,7 @@ describe("VocabTerm tests", () => {
       );
 
       expect(myTerm.isClass).toBe(false);
-      myTerm.addType(RDF_CLASS);
+      myTerm.addType(RDFS_CLASS);
       expect(myTerm.isClass).toBe(true);
     });
 
diff --git a/src/VocabTerm.ts b/src/VocabTerm.ts
index bfeca9c9..6dd30a46 100755
--- a/src/VocabTerm.ts
+++ b/src/VocabTerm.ts
@@ -42,10 +42,10 @@ const DEFAULT_LOCALE = "en";
 // We need an instance of an RDF Factory to instantiate a Named Node, but we
 // only want to create instances of these RDF types if we are checking for the
 //
-let LAZY_TYPE_RDF_CLASS: NamedNode | undefined = undefined;
+let LAZY_TYPE_RDFS_CLASS: NamedNode | undefined = undefined;
 let LAZY_TYPE_OWL_CLASS: NamedNode | undefined = undefined;
 
-let LAZY_TYPE_RDFS_PROPERTY: NamedNode | undefined = undefined;
+let LAZY_TYPE_RDF_PROPERTY: NamedNode | undefined = undefined;
 let LAZY_TYPE_OWL_DATATYPE_PROPERTY: NamedNode | undefined = undefined;
 let LAZY_TYPE_OWL_OBJECT_PROPERTY: NamedNode | undefined = undefined;
 let LAZY_TYPE_OWL_ANNOTATION_PROPERTY: NamedNode | undefined = undefined;
@@ -266,8 +266,8 @@ class VocabTerm implements NamedNode {
   }
 
   createNamedNodeConstantsClass(): void {
-    LAZY_TYPE_RDF_CLASS = this.rdfFactory.namedNode(
-      "http://www.w3.org/1999/02/22-rdf-syntax-ns#Class",
+    LAZY_TYPE_RDFS_CLASS = this.rdfFactory.namedNode(
+      "http://www.w3.org/2000/01/rdf-schema#Class",
     );
 
     LAZY_TYPE_OWL_CLASS = this.rdfFactory.namedNode(
@@ -276,8 +276,8 @@ class VocabTerm implements NamedNode {
   }
 
   createNamedNodeConstantsProperty(): void {
-    LAZY_TYPE_RDFS_PROPERTY = this.rdfFactory.namedNode(
-      "http://www.w3.org/2000/01/rdf-schema#Property",
+    LAZY_TYPE_RDF_PROPERTY = this.rdfFactory.namedNode(
+      "http://www.w3.org/1999/02/22-rdf-syntax-ns#Property",
     );
     LAZY_TYPE_OWL_DATATYPE_PROPERTY = this.rdfFactory.namedNode(
       "http://www.w3.org/2002/07/owl#Property",
@@ -303,23 +303,23 @@ class VocabTerm implements NamedNode {
   }
 
   get isClass(): boolean {
-    if (!LAZY_TYPE_RDF_CLASS) {
+    if (!LAZY_TYPE_RDFS_CLASS) {
       this.createNamedNodeConstantsClass();
     }
 
     return (
-      (this._type?.has(LAZY_TYPE_RDF_CLASS!) ||
+      (this._type?.has(LAZY_TYPE_RDFS_CLASS!) ||
         this._type?.has(LAZY_TYPE_OWL_CLASS!)) !== undefined
     );
   }
 
   get isProperty(): boolean {
-    if (!LAZY_TYPE_RDFS_PROPERTY) {
+    if (!LAZY_TYPE_RDF_PROPERTY) {
       this.createNamedNodeConstantsProperty();
     }
 
     return (
-      (this._type?.has(LAZY_TYPE_RDFS_PROPERTY!) ||
+      (this._type?.has(LAZY_TYPE_RDF_PROPERTY!) ||
         this._type?.has(LAZY_TYPE_OWL_OBJECT_PROPERTY!) ||
         this._type?.has(LAZY_TYPE_OWL_DATATYPE_PROPERTY!) ||
         this._type?.has(LAZY_TYPE_OWL_ANNOTATION_PROPERTY!) ||