The Semantic Web
The Semantic Web, also known as Web 3.0 or the Giant Global Graph, extends the World Wide Web by adding machine-readable data layers to existing web content. This enables computers to understand and process web information more effectively.
Core Technologies
RDF (Resource Description Framework)
- Foundation of Semantic Web data representation
- Uses subject-predicate-object triples
- Enables machine-readable data relationships
- W3C RDF Specification
OWL (Web Ontology Language)
- Formal language for defining ontologies
- Supports complex relationships and rules
- Enables automated reasoning
- W3C OWL Overview
SPARQL
- Query language for RDF data
- Similar to SQL for relational databases
- Supports federated queries across datasets
- W3C SPARQL Specification
Key Concepts
Linked Data
- Method of publishing structured data
- Uses URIs as identifiers
- Connects related data across the web
- Linked Data Principles
Ontologies
- Formal representations of knowledge domains
- Define concepts and relationships
- Enable semantic interoperability
- Examples: Schema.org, FOAF, Dublin Core
Triple Stores
Applications
Knowledge Graphs
- Google Knowledge Graph
- Wikidata
- DBpedia
- Schema.org
Industry Use Cases
- Scientific research data integration
- Enterprise knowledge management
- Digital libraries and archives
- Healthcare information systems
Resources
Learning Materials
Communities