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README.md

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 ## Contents
 
 <!-- TOC -->
-
 * [ontouml-vocabulary-lib](#ontouml-vocabulary-lib)
-    * [Contents](#contents)
-    * [Installation and Use](#installation-and-use)
-        * [Prerequisites](#prerequisites)
-        * [Instructions for Users](#instructions-for-users)
-        * [Instructions for Contributors](#instructions-for-contributors)
-    * [Introduction](#introduction)
-        * [The OntoUML Vocabulary](#the-ontouml-vocabulary)
-        * [The RDFLib](#the-rdflib)
-    * [The ontouml-vocabulary-lib Concepts](#the-ontouml-vocabulary-lib-concepts)
-        * [OntoUML Terms](#ontouml-terms)
-            * [Descriptions of the Methods:](#descriptions-of-the-methods)
-            * [Usage examples](#usage-examples)
-        * [OntoUML Constants](#ontouml-constants)
-            * [Usage examples](#usage-examples-1)
-            * [OUEnumerations Class Method Descriptions](#ouenumerations-class-method-descriptions)
-        * [Classes Specializing `_OUElement`](#classes-specializing-ouelement)
-        * [Enumeration Classes](#enumeration-classes)
-        * [Note](#note)
-        * [OntoUML Custom Exceptions](#ontouml-custom-exceptions)
-            * [Descriptions of Exceptions](#descriptions-of-exceptions)
-    * [How to Contribute](#how-to-contribute)
-        * [Report Issues](#report-issues)
-        * [Code Contribution](#code-contribution)
-        * [Test Contribution](#test-contribution)
-        * [General Guidelines](#general-guidelines)
-    * [Author](#author)
-
+  * [Contents](#contents)
+  * [Installation and Use](#installation-and-use)
+    * [Prerequisites](#prerequisites)
+    * [Instructions for Users](#instructions-for-users)
+    * [Instructions for Contributors](#instructions-for-contributors)
+  * [Technological Background](#technological-background)
+    * [The OntoUML Vocabulary](#the-ontouml-vocabulary)
+    * [The RDFLib](#the-rdflib)
+  * [Concepts](#concepts)
+    * [OntoUML Terms](#ontouml-terms)
+      * [Methods](#methods)
+      * [Usage Examples](#usage-examples)
+    * [OntoUML Constants](#ontouml-constants)
+      * [Usage Examples](#usage-examples-1)
+  * [Code Testing](#code-testing)
+  * [How to Contribute](#how-to-contribute)
+    * [Reporting Issues](#reporting-issues)
+    * [Code Contributions](#code-contributions)
+    * [Test Contributions](#test-contributions)
+    * [General Guidelines](#general-guidelines)
+  * [License](#license)
+  * [Author](#author)
 <!-- TOC -->
 
 ## Installation and Use