Why does the format (Book) filter disappears when switching to Libraries Worldwide?
Symptom
The Format filter (e.g., Book) Disappears, reduces, or changes ......
- After:
- Selecting formats such as Article / Chapter, and/or
- Switching from My Library to Libraries Worldwide
Applies to
- WorldCat Discovery
- Refine Results / Facets panel
Cause
This is expected behaviour due to how Discovery generates facets across different search scopes.
-
Switching to Libraries Worldwide changes the search from:
- Local library data → Global WorldCat data
-
The global dataset:
- Combines records from many libraries
- Includes inconsistent or mixed format metadata
-
As a result, Discovery may not reliably generate detailed format facets.
Explanation
No fix is required.
When using Libraries Worldwide, Discovery may:
- Hide or remove the Format filter (e.g., Book)
- Reduce available format options
- Replace it with broader facets such as:
- Material Type
- Content Type
In some cases:
- The filter may still exist but:
- Appears under a different label, or
- Moves within the Refine Results pane
- The behaviour is by design
- Facets are more stable and detailed in My Library because the data is more consistent
- Libraries Worldwide prioritises broader results over strict filtering
Guidence/ Workaround
-
For precise format filtering (e.g., Book only):
- Use My Library scope
-
For broader discovery across libraries:
- Use Libraries Worldwide
- Expect fewer or simplified filters
Additional information
Global data = Gives mixed/inconsistent formats
My Library/ Local data = Used for accurate format filtering
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See guide: Filter and refine search results - WorldCat Discovery and
Video: WorldCat Discovery: Filtering search results in WorldCat ...