How to build a knowledge graph

Chaired by: Elias Karle, Umutcan S ̧im ̧sek, Dieter Fensel (all Semantic Technology Institute Innsbruck)

Building and hosting a Knowledge Graph requires some effort and a lot of experience in semantic technologies. Turning this Knowledge Graph into a useful resource for problem solving requires even more effort. The overall goal of building a Knowledge Graph is to provide cost-sensitive methods to host knowledge, improve the quality of large Knowledge Graphs and ensuring their usefulness for envisaged applications: “There are two main goals of Knowledge Graph refinement: (a) adding missing knowledge to the graph, i.e., completion, and (b) identifying wrong information in the graph, i.e. error detection.” [5] This tutorial is targeting the process from knowledge creation over knowledge hosting, knowledge curation to knowledge deployment - applied to a Knowledge Graph using schema.org as an ontology.

Goal

Introducing methods, tools and best practices for knowledge creation, hosting, curation (i.e. assessment, correction and enrichment) and deployment. Building a Knowledge Graph based on manually and semi-automatically created schema.org annotations.

Tentative Structure of the Tutorial

1. What is a Knowledge Graph: Introduction to Knowledge Graphs, a simple formalism, examples of open and proprietary Knowledge Graphs
2. Manual and semi-automatic creation of knowledge: Introduction to schema.org, domain specific patterns for schema.or annotations[8], tools and methods for knowledge creation (e.g. RML [1, 7]), demonstrations with selected tools
3. Knowledge hosting: graph databases vs. document databases, provenance tracking
4. Knowledge curation: Methods and tools from the literature for assessment, correction and enrichment of Knowledge Graphs
5. Knowledge deployment: Publication and consumption of Knowledge Graphs through, for example, intelligent personal assistants, chatbots...

Slidedeck

• How To Build A Knowledge Graph, Elias Kärle & Umutcan Simsek

Organizers

The organizers have strong background in semantic technologies due to their active research in that field (see Section 2). Besides that, the organizers have a lot of co-operations with industry partners and are organizing events for a very long time (Dieter Fensel is for example co-founder of ESWC, ISWC and TourismFastForward. Elias K ̈arle and Umutcan Simsek were organizing several tutorials and workshops for and with industry partners).