# System Workflows

This document describes the key workflows and processes in the Knowledge Graph Engine v2 system.

## 🔄 Core Workflows

### 1. **Information Processing Workflow**

```mermaid
flowchart TD
    A[User Input] --> B{Input Type}
    
    B -->|Text| C[LLM Extraction]
    B -->|Structured| D[Direct Processing]
    
    C --> E[Entity/Relationship Extraction]
    D --> E
    
    E --> F{Is Negation?}
    
    F -->|Yes| G[Find Matching Relationships]
    F -->|No| H[Conflict Detection]
    
    G --> I[Mark as Obsolete]
    H --> J{Conflicts Found?}
    
    J -->|Yes| K[Resolve Conflicts]
    J -->|No| L[Add New Relationship]
    
    I --> M[Update Vector Store]
    K --> N[Update Existing]
    L --> O[Create New Triplet]
    
    N --> M
    O --> P[Add to Vector Store]
    
    M --> Q[Update Graph Database]
    P --> Q
    
    Q --> R[Return Results]
    
    style A fill:#e3f2fd
    style R fill:#e8f5e8
    style C fill:#fff3e0
    style G fill:#ffebee
    style K fill:#f3e5f5
```

### 2. **Search and Query Workflow**

```mermaid
flowchart TD
    A[Search Query] --> B[Query Parsing]
    
    B --> C{Search Type}
    
    C -->|Direct| D[Graph Traversal]
    C -->|Semantic| E[Vector Search]
    C -->|Hybrid| F[Both Approaches]
    
    D --> G[Cypher Queries]
    E --> H[Embedding Generation]
    F --> G
    F --> H
    
    G --> I[Graph Results]
    H --> J[Vector Similarity]
    
    J --> K[Relevance Filtering]
    
    I --> L[Merge Results]
    K --> L
    
    L --> M[Rank by Relevance]
    
    M --> N{Generate Answer?}
    
    N -->|Yes| O[LLM Answer Generation]
    N -->|No| P[Return Raw Results]
    
    O --> Q[Final Response]
    P --> Q
    
    style A fill:#e3f2fd
    style Q fill:#e8f5e8
    style H fill:#fff3e0
    style O fill:#fff3e0
```

### 3. **Conflict Resolution Workflow**

```mermaid
flowchart TD
    A[New Relationship] --> B[Find Potential Conflicts]
    
    B --> C{Same Subject + Relationship?}
    
    C -->|No| D[No Conflict - Add Directly]
    C -->|Yes| E[Check Object Difference]
    
    E --> F{Different Object?}
    
    F -->|No| G[Duplicate Detection]
    F -->|Yes| H{Location/Status Relationship?}
    
    G --> I{Better Confidence?}
    
    I -->|Yes| J[Update Existing]
    I -->|No| K[Keep Existing]
    
    H -->|Yes| L[Automatic Conflict]
    H -->|No| M[Semantic Similarity Check]
    
    L --> N[Mark Old as Obsolete]
    M --> O{Similarity > Threshold?}
    
    O -->|Yes| P[Manual Review Required]
    O -->|No| Q[Allow Both]
    
    N --> R[Add New Relationship]
    J --> S[Update Metadata]
    K --> T[Return Existing]
    P --> U[Flag for Review]
    Q --> R
    
    R --> V[Update Timestamps]
    S --> V
    T --> V
    U --> V
    
    V --> W[Return Result]
    
    style A fill:#e3f2fd
    style W fill:#e8f5e8
    style L fill:#ffebee
    style P fill:#fff3e0
```

### 4. **Vector Search Precision Workflow**

```mermaid
flowchart TD
    A[Search Query] --> B[Generate Query Embedding]
    
    B --> C[Vector Similarity Search]
    
    C --> D[Get Top K*3 Results]
    
    D --> E[Apply Similarity Threshold]
    
    E --> F[Extract Keywords]
    
    F --> G[Calculate Keyword Overlap]
    
    G --> H[Adjust Scores]
    
    H --> I[Contextual Relevance Check]
    
    I --> J{Work Query?}
    
    J -->|Yes| K[Prioritize Work Relationships]
    J -->|No| L{Location Query?}
    
    L -->|Yes| M[Prioritize Location Relationships]
    L -->|No| N[Default Filtering]
    
    K --> O[Apply Work Thresholds]
    M --> P[Apply Location Thresholds]
    N --> Q[Apply Default Thresholds]
    
    O --> R[Filter Results]
    P --> R
    Q --> R
    
    R --> S[Sort by Adjusted Score]
    
    S --> T[Return Top K Results]
    
    style A fill:#e3f2fd
    style T fill:#e8f5e8
    style I fill:#f3e5f5
    style J fill:#fff3e0
    style L fill:#fff3e0
```

### 5. **Entity Search Workflow**

```mermaid
flowchart TD
    A[Entity Search Request] --> B[Extract Entity Names]
    
    B --> C[Generate Direct Graph Query]
    
    C --> D[Execute Cypher Query]
    
    D --> E[MATCH nodes WHERE subject/object = entity]
    
    E --> F[Filter by Status]
    
    F --> G[Order by Confidence]
    
    G --> H[Collect Results]
    
    H --> I[Remove Duplicates]
    
    I --> J[Sort by Relevance]
    
    J --> K[Return Exact Matches]
    
    style A fill:#e3f2fd
    style K fill:#e8f5e8
    style E fill:#c8e6c9
    style G fill:#f3e5f5
```

## 🔄 Data Transformation Workflows

### 6. **Triplet Creation Workflow**

```mermaid
flowchart TD
    A[Raw Data] --> B[Create GraphEdge]
    
    B --> C[Generate Edge Metadata]
    
    C --> D[Set Timestamps]
    
    D --> E[Calculate Confidence]
    
    E --> F[Determine Status]
    
    F --> G[Create GraphTriplet]
    
    G --> H[Generate Vector Text]
    
    H --> I[Create Embedding]
    
    I --> J[Store in Neo4j]
    
    J --> K{Success?}
    
    K -->|Yes| L[Update Indexes]
    K -->|No| M[Rollback Transaction]
    
    L --> N[Return Triplet ID]
    M --> O[Return Error]
    
    style A fill:#e3f2fd
    style N fill:#e8f5e8
    style O fill:#ffebee
    style J fill:#c8e6c9
```

### 7. **Embedding Generation Workflow**

```mermaid
flowchart TD
    A[Text Input] --> B[Preprocess Text]
    
    B --> C[Load Sentence Transformer Model]
    
    C --> D[Generate Embedding]
    
    D --> E[Normalize Vector]
    
    E --> F[Validate Dimensions]
    
    F --> G{Valid?}
    
    G -->|Yes| H[Store in Neo4j Vector Index]
    G -->|No| I[Log Error]
    
    H --> J[Update Metadata]
    I --> K[Use Fallback]
    
    J --> L[Return Success]
    K --> M[Return Warning]
    
    style A fill:#e3f2fd
    style L fill:#e8f5e8
    style M fill:#fff3e0
    style I fill:#ffebee
```

## 🎯 Performance Optimization Workflows

### 8. **Query Optimization Workflow**

```mermaid
flowchart TD
    A[Incoming Query] --> B[Analyze Query Pattern]
    
    B --> C{Query Type}
    
    C -->|Entity Lookup| D[Use Entity Index]
    C -->|Relationship Search| E[Use Relationship Index]
    C -->|Vector Search| F[Use Vector Index]
    C -->|Complex| G[Query Plan Analysis]
    
    D --> H[Optimize for Entity Access]
    E --> I[Optimize for Relationship Traversal]
    F --> J[Optimize for Vector Similarity]
    G --> K[Multi-step Optimization]
    
    H --> L[Execute Optimized Query]
    I --> L
    J --> L
    K --> L
    
    L --> M[Monitor Performance]
    
    M --> N[Log Metrics]
    
    N --> O[Return Results]
    
    style A fill:#e3f2fd
    style O fill:#e8f5e8
    style M fill:#f3e5f5
```

## ⚡ Error Handling Workflows

### 9. **Error Recovery Workflow**

```mermaid
flowchart TD
    A[Operation Failure] --> B{Error Type}
    
    B -->|Neo4j Connection| C[Retry with Backoff]
    B -->|LLM API| D[Switch to Fallback]
    B -->|Validation| E[Return Validation Error]
    B -->|Unknown| F[Log and Continue]
    
    C --> G{Retry Successful?}
    D --> H[Use Pattern Matching]
    E --> I[Return Error Response]
    F --> J[Default Handling]
    
    G -->|Yes| K[Continue Operation]
    G -->|No| L[Escalate Error]
    
    H --> M[Limited Functionality]
    
    K --> N[Success]
    L --> O[System Alert]
    M --> P[Partial Success]
    I --> Q[User Error]
    J --> R[Unknown State]
    
    style A fill:#ffebee
    style N fill:#e8f5e8
    style P fill:#fff3e0
    style Q fill:#ffebee
    style R fill:#ffebee
```

## 📊 Monitoring and Observability

### 10. **Health Check Workflow**

```mermaid
flowchart TD
    A[Health Check Request] --> B[Check Neo4j Connection]
    
    B --> C{Neo4j OK?}
    
    C -->|Yes| D[Check Vector Indexes]
    C -->|No| E[Return DB Error]
    
    D --> F{Indexes OK?}
    
    F -->|Yes| G[Check LLM Connectivity]
    F -->|No| H[Return Index Error]
    
    G --> I{LLM OK?}
    
    I -->|Yes| J[System Healthy]
    I -->|No| K[Degraded Mode]
    
    J --> L[Return Health Status]
    K --> L
    E --> L
    H --> L
    
    style A fill:#e3f2fd
    style J fill:#e8f5e8
    style K fill:#fff3e0
    style E fill:#ffebee
    style H fill:#ffebee
```

## 🔧 Maintenance Workflows

### 11. **Index Maintenance Workflow**

```mermaid
flowchart TD
    A[Scheduled Maintenance] --> B[Check Index Health]
    
    B --> C[Analyze Query Performance]
    
    C --> D{Performance Issues?}
    
    D -->|Yes| E[Identify Bottlenecks]
    D -->|No| F[Routine Cleanup]
    
    E --> G[Rebuild Indexes]
    F --> H[Cleanup Old Data]
    
    G --> I[Verify Index Integrity]
    H --> J[Update Statistics]
    
    I --> K{Indexes Valid?}
    
    K -->|Yes| L[Update Monitoring]
    K -->|No| M[Alert Administrator]
    
    J --> L
    
    L --> N[Maintenance Complete]
    M --> O[Manual Intervention Required]
    
    style A fill:#e3f2fd
    style N fill:#e8f5e8
    style O fill:#ffebee
```

These workflows represent the core operational patterns of the Knowledge Graph Engine v2 system, showing how data flows through the system and how different components interact to provide intelligent knowledge graph capabilities.