d3web-Core is main platform API (application programing interface) for the development of knowledge-based applications. The platform is available as a collection of Java libraries providing a sophisticated plugin architecture.

A number of components is already included in d3web-Core:

• General representation and persistence of terminological knowledge to represent question (inputs) and solutions (outputs).
• Reasoning engines and persistence for strong problem-solving methods including
  • Decision trees
  • Scoring rules
  • Temporal rules
  • DiaFlux models (flowchart knowledge)
  • Set-covering models (abductive knowledge)
  • Scoring tables
• Libraries for testing knowledge bases

Among others, the following applications are using the d3web-Core:

• KnowWE, a semantic wiki for building knowledge-based applications
• Knowledge Base Book, a generator to create printable documents from knowledge bases