Contents

1 Introduction

2 Related Works

3 Motivating Example

4 Infrastructure for Querying Linked Data

5 Federation over SPARQL Endpoints Basic Approach and Technique
5.1 Architecture of Federation over SPARQL Endpoints
5.2 Basic Steps of Federation over SPARQL Endpoints

6 The Existing Federation over SPARQL Endpoints Frameworks
6.1 The Existing Federation over SPARQL Endpoints Frameworks Based on Their Architecture

7 Desired Features

8 Challenges

9 Conclusion