Citation Graph Visualization

[huypham37]

Overview

Visualize paper connections showing cites/cited-by relationships.

Why

Scientists need to understand how papers relate. "What papers cite this?" and "What does this cite?" reveal research lineage.

Plan

1. Data Model

// Model/CitationLink.swift
struct CitationLink: Codable {
    let sourcePaperId: String  // Paper that cites
    let targetPaperId: String  // Paper being cited
    let context: String?       // Citation context snippet
}

2. Fetch Citation Data

• Semantic Scholar API (has citation graph)
• OpenCitations API (open data)
• Cache locally

3. Graph Visualization

• Use SwiftUI Canvas or custom view
• Node = paper (size by citation count)
• Edge = citation link
• Pan/zoom navigation
• Click node → show paper details

4. Graph Modes

• Ego network: Selected paper + its citations + citing papers
• Space network: All papers in space + their connections
• Depth control: 1-hop, 2-hop connections

5. Integration

• "Show Citation Graph" button on paper
• Graph view tab in space

Acceptance Criteria

• Show papers citing selected paper
• Show papers cited by selected paper
• Interactive graph visualization
• Click node opens paper
• Works with DOI-identified papers