Seeing the web in this way has led to the development of a web of documents, or webpages as they are more commonly known, designed for humans to access and read. About 4.75 billion of them [http://www.worldwidewebsize.com]. Many of the documents are linked together, and those connections add value (Hyperlink). In a blog, newspaper article or academic paper, we can use links to build on previous discussions or point to factual sources. They help us to explore the web of documents.