Hypertexts combine rich knowledge structures with ways of exploring them. Structured knowledge representations have been developed across domains ranging from digital humanities to scientific research. Recently, knowledge graphs have emerged as an important framework for knowledge representation. They are applied in services such as Wikidata. This workshop will consider how knowledge graphs and related structured knowledge can provide a foundation for different types of user interaction, such as argumentation and issue-based information systems, explanations, guided tours, and adaptive personalization. And conversely, how knowledge structures can be extended to support these modes of interaction. There are many areas to be examined, such as extensions to ontologies, rules, semantic modeling, capturing the evolution of knowledge, and the relationship to LLMs.