---
name: zoplicate-dedup-guide-b30c2a287fa3
description: "Detect and manage duplicate items in Zotero libraries"
metadata:
  openclaw:
    emoji: "🔃"
    category: "literature"
    subcategory: "metadata"
    keywords: ["Zotero", "deduplication", "duplicate detection", "library cleanup", "metadata merge"]
    source: "https://github.com/ChenglongMa/zoplicate"
---

# Zoplicate: Zotero Deduplication Guide

## Overview

Zoplicate is a Zotero plugin that detects and manages duplicate items in your library. It goes beyond Zotero's built-in duplicate detection by offering configurable matching criteria, batch merge operations, automatic deduplication on import, and smart metadata merging that keeps the best version of each field. Essential for researchers who import from multiple databases.

## Installation

```bash
# Download .xpi from GitHub releases
# Zotero 7: Tools → Add-ons → Install Add-on From File
```

## Features

```markdown
### Duplicate Detection
- **DOI matching** — Most reliable, catches exact duplicates
- **Title similarity** — Fuzzy matching for slight variations
- **ISBN matching** — For books and proceedings
- **Combined scoring** — Weighted match across multiple fields

### Smart Merge
- Keep the most complete metadata from each duplicate
- Preserve all tags from both items
- Merge notes and annotations
- Consolidate attachments (keep all unique PDFs)
- Maintain collection memberships from both

### Automatic Mode
- Detect duplicates on import
- Configurable auto-merge threshold
- Notification before auto-merge (optional)
```

## Configuration

```json
{
  "detection": {
    "criteria": {
      "doi": {"enabled": true, "weight": 1.0},
      "title": {"enabled": true, "weight": 0.8,
                 "similarity_threshold": 0.85},
      "isbn": {"enabled": true, "weight": 1.0},
      "year_author": {"enabled": true, "weight": 0.6}
    },
    "overall_threshold": 0.7,
    "ignore_case": true,
    "normalize_unicode": true
  },
  "merge": {
    "strategy": "keep_most_complete",
    "preserve_tags": true,
    "merge_notes": true,
    "keep_all_attachments": true,
    "prefer_fields_from": "newer"
  },
  "auto": {
    "detect_on_import": true,
    "auto_merge": false,
    "notify_on_detect": true
  }
}
```

## Usage Workflow

```markdown
### Manual Deduplication
1. Tools → Zoplicate → Find Duplicates
2. Review duplicate groups (side-by-side comparison)
3. Select master item for each group
4. Click "Merge" — metadata combined, duplicates removed

### Batch Operations
1. Tools → Zoplicate → Find All Duplicates
2. Review summary (X groups, Y total duplicates)
3. "Auto-select best" — picks master by completeness
4. "Merge All" — batch process all groups

### Import Deduplication
1. Import papers from database export (RIS, BibTeX)
2. Zoplicate auto-checks against existing library
3. Popup shows potential duplicates
4. Choose: Skip / Merge / Import as new
```

## Matching Examples

```markdown
### DOI Match (100% confidence)
Item A: "Attention Is All You Need" — DOI: 10.48550/arXiv.1706.03762
Item B: "Attention is All You Need" — DOI: 10.48550/arXiv.1706.03762
→ Exact duplicate (same DOI)

### Title Fuzzy Match (85% similarity)
Item A: "BERT: Pre-training of Deep Bidirectional Transformers..."
Item B: "Bert: Pre-Training of Deep Bidirectional Transformers..."
→ Likely duplicate (title similarity > threshold)

### Different Versions (not duplicate)
Item A: "Paper Title" (arXiv v1, 2023)
Item B: "Paper Title" (Published version, 2024)
→ Different DOIs, may want to keep both or merge
```

## Integration Tips

```markdown
### Multi-Database Import Workflow
1. Search PubMed → Export RIS → Import to Zotero
2. Search Scopus → Export RIS → Import to Zotero
3. Search Web of Science → Export RIS → Import to Zotero
4. Zoplicate detects cross-database duplicates
5. Merge: keep best metadata from each source

### With Other Plugins
- **Zotero Connector** — Detect dups on browser import
- **Better BibTeX** — Preserve citation keys on merge
- **ZotMoov** — Reorganize attachments after merge
```

## Use Cases

1. **Library cleanup**: Remove duplicates from large collections
2. **Import dedup**: Prevent duplicates when importing from databases
3. **Systematic reviews**: Deduplicate multi-database search results
4. **Lab libraries**: Merge shared group library duplicates
5. **Migration**: Clean up after importing from other reference managers

## References

- [Zoplicate GitHub](https://github.com/ChenglongMa/zoplicate)
- [Zotero Duplicate Detection](https://www.zotero.org/support/duplicate_detection)


---
Source attribution: wentorai
Original project: https://github.com/wentorai/research-plugins/blob/bf44b3cd617fa94c8a1b254c5d1987142ca3d631/skills/literature/metadata/zoplicate-dedup-guide/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 Wentor AI

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: wentorai
Original project: https://github.com/wentorai/research-plugins/blob/bf44b3cd617fa94c8a1b254c5d1987142ca3d631/skills/literature/metadata/zoplicate-dedup-guide/SKILL.md
Attribution basis: Source repository record

Fields of work: Education & Research, Marketing, Product Management
Roles: Content Marketer, Product Manager, Researcher
Specialties: Specialty not specified
Tools: Zotero
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 7684791aa1f322629914a2f05d34c6513400b81d421655eaad8ab6ba09d2368c