Zotero
Free tool for collecting, organising, citing and sharing bibliographic references.
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Build a traceable bibliography
Import source records, correct metadata and associate the text actually consulted.
Check first: Review generated references before submission; imported fields can be incomplete.
Compare this resource with other directory records →
Compare two records before merging them
- Possible duplicates
- Inspect suggested candidates.
- Master record
- Choose fields to preserve.
- Compare titles, authors and DOI or ISBN identifiers.
- Distinguish a repeated import from another edition.
- For a true duplicate, merge and inspect the retained fields.
Fictional example: a library contains two book records dated 1998 and 2012. Eloise checks the editions before deciding. Identical titles alone do not justify merging them: her bibliography may need both editions.
Your useful record: Compared identifiers, retained edition and reason for the decision.
Detection suggests candidates; deciding requires bibliographic comparison.
Editorial method informed by Zotero Documentation — Duplicate detection. Documentation consulted on . Examples are fictional exercises, not results from a live service test.
File one reference under two projects without duplicating it
Within a Zotero library, one item can belong to several collections.
| Element | Meaning |
|---|---|
| Collection | Hierarchical grouping for a project. |
| Tag | Cross-cutting keyword, such as “to read”. |
| Deleting a collection | Removes the grouping without removing its library items. |
Try the reasoning
Illustrative situation. An item appears in “Essay” and “Thesis”. Should two items be merged?
Read the explanation
Not on that evidence alone: examine the library root. Two memberships are not two items.
Documentation for the table : Zotero — Collections and Tags · . The exercise is an editorial example.
Merge references without losing context
Zotero detects records that may be duplicates. Compare title, author, year and identifier before merging. Different versions of a work are not necessarily interchangeable. The merged record should identify the version you intend to cite.
- Detection
- Use the collection of suspected duplicates.
- Checking
- Compare fields and document type.
- Merge
- Review the resulting record before citing it.
- Duplicate scope
- Detection operates within a library. References in different group libraries are not compared with each other.
- Keep organisation
- For a confirmed duplicate, merging preserves item collections and tags. Select the field values to retain before confirming.
- One item, several collections
- Adding one item to several collections does not create additional items. Count distinct references in the library rather than summing collections.
Source: Zotero — Collections and Tags · consulted on - Remove versus delete
- Removing an item from a collection differs from moving it to the trash. “Delete Collection” and “Delete Collection and Items” also have different effects: read the command before confirming.
Source: Zotero — Collections and Tags · consulted on - Zotero duplicate scope
- Detection operates within one library, not across different libraries.
Source: Zotero Documentation — Duplicate detection · consulted on - Merging instead of deleting
- Merging preserves collections, tags and links to word-processor citations.
Source: Zotero Documentation — Duplicate detection · consulted on
Should similar records all be deleted?
No. Determine whether they are duplicates, different editions or different versions.
Initial profile documentation
Initial profile documentation consulted on . Added details carry their own source and consultation date above.
Editorial selection, without website certification. Read our method.