---
language:
- he
- en
library_name: transformers
pipeline_tag: token-classification
base_model: dicta-il/dictabert
tags:
- named-entity-recognition
- token-classification
- hebrew-manuscripts
- marc
- role-classification
inference: true
---

# Hebrew Manuscript Joint NER v2

This repository contains the MHM Pipeline person NER model. The current
checkpoint is the role-aware v3 replacement for the earlier custom two-head
checkpoint, while keeping the same repository and bundle name for compatibility.

The model is a DictaBERT token-classification checkpoint that predicts BIO labels
with the person role encoded directly in the tag:

- `AUTHOR`
- `TRANSCRIBER`
- `OWNER`
- `CENSOR`
- `TRANSLATOR`
- `COMMENTATOR`

## Evaluation

Held-out v3 test split, 904 items:

| Metric | Score |
|---|---:|
| strict span + role F1 | 0.8031 |
| strict precision | 0.7888 |
| strict recall | 0.8180 |
| name-only F1 | 0.8665 |
| role accuracy when name matched | 0.9269 |

Per-role strict span+role F1:

| Role | F1 |
|---|---:|
| AUTHOR | 0.8678 |
| CENSOR | 0.8830 |
| COMMENTATOR | 0.5185 |
| OWNER | 0.7330 |
| TRANSCRIBER | 0.8112 |
| TRANSLATOR | 0.9072 |

## Usage

```python
from transformers import AutoModelForTokenClassification, AutoTokenizer

repo_id = "alexgoldberg/hebrew-manuscript-joint-ner-v2"
tokenizer = AutoTokenizer.from_pretrained(repo_id)
model = AutoModelForTokenClassification.from_pretrained(repo_id)
```

In MHM Pipeline, use `ner.inference_pipeline.JointNERPipeline`. It preserves the
legacy output schema:

```python
from ner.inference_pipeline import JointNERPipeline

pipeline = JointNERPipeline("alexgoldberg/hebrew-manuscript-joint-ner-v2")
entities = pipeline.process_text("הספר נכתב על ידי משה בן יעקב.")
```

Example output:

```json
[
  {
    "person": "משה בן יעקב",
    "role": "TRANSCRIBER",
    "confidence": 0.9918,
    "model_confidence": 0.9918,
    "start": 17,
    "end": 28
  }
]
```

## Notes

The previous custom checkpoint can be recovered from the Hub commit history. This
version intentionally replaces keyword-based role classification with neural
role-aware BIO labels.