  Knowledge graphs represent concepts (e.g., people, places, events) and their
semantic relationships. As a data structure, they underpin a digital
information system, support users in resource discovery and retrieval, and are
useful for navigation and visualization purposes. Within the libaries and
humanities domain, knowledge graphs are typically rooted in knowledge
organization systems, which have a century-old tradition and have undergone
their digital transformation with the advent of the Web and Linked Data. Being
exposed to the Web, metadata and concept definitions are now forming an
interconnected and decentralized global knowledge network that can be curated
and enriched by community-driven editorial processes. In the future, knowledge
graphs could be vehicles for formalizing and connecting findings and insights
derived from the analysis of possibly large-scale corpora in the libraries and
digital humanities domain.
