RDF(S) in Practice
RDF or XML?

Q: For a specific application, should I use XML or RDF?
A: It depends…
- XML's model is
  - a tree, i.e., a strong hierarchy
  - applications may rely on hierarchy position (e.g., li in HTML)
  - relatively simple syntax and structure
  - not easy to combine trees
- RDF's model is
  - a loose collections of relations
  - applications may do “database”-like search
  - not easy to recover hierarchy
  - easy to combine relations in one big collection
  - great for the integration of heterogeneous information