How They Work Together:

• RDF provides the structure for representing information.  
• SPARQL allows you to query and extract information from RDF data.  
• Ontologies provide the context and meaning behind the data.  
• RDFS:

Basic Ontology Language: Provides a simple vocabulary for defining classes, properties, and hierarchies.

Real-World Applications:

• Knowledge Graphs: Representing complex information in a graph-like structure.  
• AI and Machine Learning: Providing structured data for training models.  

Source: https://www.obitko.com/tutorials/ontologies-semantic-web/semantic-web-architecture.html