---
license: cc0-1.0
task_categories:
- image-to-text
language:
- en
tags:
- ocr
- structured-extraction
- kie
- index-cards
- glam
- manuscript-catalogue
- held-out
- unlabeled
size_categories:
- n<1K
source_datasets:
- biglam/rubenstein-manuscript-catalog
pretty_name: Rubenstein Manuscript Cards — Held-out Schema Probe
---

# Rubenstein manuscript cards — held-out schema probe

**30 manuscript-catalogue card images** from the Duke Rubenstein collection
([`biglam/rubenstein-manuscript-catalog`](https://huggingface.co/datasets/biglam/rubenstein-manuscript-catalog)),
used as a **held-out generalization probe**: a collection and schema the
[index-card-extractor-4b](#) model was **never trained on**. Tests whether the model still emits
valid, schema-conforming JSON for an unseen schema (it does — better than the base model).

No ground truth — this measures schema-following (valid-JSON rate, key-conformance, field coverage),
not field accuracy. A candidate Rubenstein extraction schema ships with the project code.

## Columns
`image_id` · `image`.

## Provenance & license
Images from `biglam/rubenstein-manuscript-catalog` (CC0). Released **CC0-1.0**.