equibert-search

EquiBERT — DEI Semantic Search

Model ID: SallySims/equibert-search

Asymmetric bi-encoder for dense retrieval over DEI document corpora. Produces 768-dimensional embeddings compatible with FAISS and other vector search engines.

Query encoder: CLS token → lightweight projection (fast at inference) Document encoder: Mean-pool → full projection (rich representation)

Usage

from transformers import pipeline

embedder = pipeline("feature-extraction", model="SallySims/equibert-search")
query_emb = embedder("gender pay gap audit findings")
# → shape (1, 768) — use for cosine similarity search

Search Modes Supported

1. Semantic search — pure dense vector similarity
2. Faceted search — filter by DEI category, bias type, score range
3. Relational search — find documents where X EXCLUDES Y
4. Multi-hop search — answer chains across documents

Recommended Index

For production use, index documents with FAISS:

import faiss
index = faiss.IndexFlatIP(768)   # inner product = cosine on normalised vectors
index.add(document_embeddings)

Model Description

EquiBERT is a multi-task DEI (Diversity, Equity and Inclusion) transformer built on a dual-encoder backbone that fuses RoBERTa-base and DeBERTa-v3-base via a learned weighted sum (α parameter). The fused representation is fed into task-specific heads covering 17 distinct DEI analysis tasks.

Organisation: SallySims Framework: PyTorch + HuggingFace Transformers Backbone: RoBERTa-base + DeBERTa-v3-base (dual encoder, fused) Language: English Domain: Organisational DEI text — HR communications, policies, job descriptions, performance reviews, leadership statements, reports

Architecture

Input Text
    │
    ├──▶ RoBERTa-base encoder ──▶ Linear projection
    │                                     │
    └──▶ DeBERTa-v3-base encoder ──▶ Linear projection
                                          │
                              Weighted fusion (learned α)
                                          │
                                   Layer Norm + Dropout
                                          │
                              Task-specific head (see below)

Training Data

Trained on synthetic DEI organisational text generated by the EquiBERT synthetic data pipeline, covering 20 DEI categories across HR, policy, leadership, and workforce analytics domains. For production use, fine-tune on real labelled DEI data.

Limitations

• Trained on synthetic data — predictions should be validated before use in real HR or policy decisions.
• English-only.
• Not a substitute for qualified DEI practitioners or legal advice.
• May reflect biases present in the training corpus.

Citation

If you use EquiBERT in your research, please cite:

@misc{equibert2024,
  author    = {SallySims},
  title     = {EquiBERT: A Multi-Task DEI Transformer},
  year      = {2024},
  publisher = {HuggingFace},
  url       = {https://huggingface.co/SallySims}
}

All EquiBERT Models