sequenceDiagram
    participant User
    participant App as MCP4RDF Service
    participant Val as Validator
    participant SHACL as SHACL Engine
    participant LLM as LLM (Llama-3.3)
    
    User->>App: Submit RDF/XML
    App->>Val: validate_rdf_tool()
    Val->>SHACL: Load template & validate
    
    alt Valid RDF
        SHACL-->>Val: Conforms
        Val-->>App: {conforms: true, status: "Valid"}
        App-->>User: Display success
    else Invalid RDF
        SHACL-->>Val: Violations found
        Val-->>App: {conforms: false, results: "errors..."}
        
        App->>LLM: get_ai_suggestions(errors, rdf)
        Note over LLM: Analyze errors<br/>Generate fix steps
        LLM-->>App: Structured suggestions
        
        App->>LLM: get_ai_correction(errors, rdf)
        Note over LLM: Generate corrected<br/>RDF/XML
        LLM-->>App: Fixed RDF/XML
        
        App-->>User: Display errors +<br/>suggestions +<br/>corrected RDF
    end