How Do I Create a Knowledge Graph from a PDF?

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How do I create a knowledge graph from a PDF?

It all starts with a triple. A simple phrase, comprised of a subject-predicate-object. Take this simple phrase. “I am Gennaro” Then take another phrase “Gennaro knows Adam D’Angelo” (I’ve never met him but you get the idea). And yet another one “Gennaro works at WordLift.” Now imagine we’re building a knowledge graph about me. We start from “Gennaro” and that is what we get. In a knowledge graph, the objects are called “nodes,” while relationships are called “edges.” Therefore “Gennaro” is a node. While “knows” (or “works at”) - represented by a arrow - is an edge. “Adam D’Angelo” and “WordLift” are other nodes. Edges (or the arrows) connect one node to the other. From connecting several nodes that is how a knowledge graph springs up. Why is that important at all? Part of Google’s search algorithm is devoted in building up a massive knowledge graph of the web. Why? Because it helps Google to better understand web pages. It also helps Google give better answer to users’ questions. Can you build a knowledge graph? Yes, you can! In fact, today building a knowledge graph by starting from your web content might be the most effective way to allow Google to understand your web pages. How can you build a knowledge graph? Content needs to be converted in data that a search engine can process. You can do that in two ways. Schema markup Open Linked Data is a vocabulary created by commercial search engines (like Google) to allow to define what web pages are about. Almost like you’re defining the content you have on a web page in a way that Google can understand that, you can use Schema as a vocabulary that bridges the gap between human language and machine language. By defining objects on your web pages with Schema and connecting them as open linked data that is almost like you help Google’s search algorithm to include that content in its knowledge vault - the massive knowledge graph Google is building. With tools like WordLift anyone with a WordPress website can build up knowledge graphs by starting from their web content!

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You don’t even need a website. So the question becomes then why do I need to code my own knowledge graph? Well, the obvious answer is that any knowledge graph needs a way to connect those nodes (or edges) to other parts of your website. You’re trying to connect objects on your website together to get a better understanding of how that object fits into the bigger website. The question is, does Google even care what object you’re trying to connect together (or to connect two together) with a knowledge graph? Is Google really going to notice if you’re making a connection between this and that? Of course, Google wants to crawl your website and learn from it. But can Google really crawl the web without your knowledge to feed into the knowledge data Google has? Could you build a knowledge graph that Google could see without the knowledge.