graph TB
    subgraph "User Interfaces"
        UI1[Web Browser<br/>Gradio UI]
        UI2[Claude Desktop<br/>MCP Client]
        UI3[External Apps<br/>via API]
    end
    
    subgraph "MCP4RDF Service Layer"
        APP[app.py<br/>Main Application]
        API[API Endpoints]
        MCP[MCP Server<br/>SSE Protocol]
        
        APP --> API
        APP --> MCP
    end
    
    subgraph "Core Functions"
        F1[validate_rdf_tool]
        F2[get_ai_suggestions]
        F3[get_ai_correction]
        F4[get_rdf_examples]
    end
    
    subgraph "Validation Engine"
        VAL[validator.py]
        SHACL[SHACL Templates]
        PY[pyshacl Library]
        
        VAL --> PY
        PY --> SHACL
    end
    
    subgraph "AI Enhancement"
        OAI[OpenAI Client]
        HF[HF Inference Endpoint]
        LLM[Llama-3.3-70B]
        
        OAI --> HF
        HF --> LLM
    end
    
    UI1 --> APP
    UI2 --> MCP
    UI3 --> API
    
    API --> F1
    API --> F2
    API --> F3
    API --> F4
    
    F1 --> VAL
    F2 --> OAI
    F3 --> OAI