eurovoc

A standalone, open-source EuroVoc classifier. It tags any text into the EU's official subject space: 7,029 descriptors (IDs) rolled up to 127 microthesauri (MT) and 21 domains (DO), multilingual including Catalan.

A modern, open successor to the 2021 PyEuroVoc package (which fine-tuned a per-language BERT, truncated documents to 512 tokens, and no longer loads under transformers 5.x), and the natural home for a retrained long-context model.

How it works

Default backend is zero-shot retrieval: a multilingual sentence-transformers model (intfloat/multilingual-e5-base) embeds the text and the EuroVoc descriptor labels (cached once), and returns the top-K by cosine behind a confidence gate. The gate prefers returning nothing over wrong tags, so proper-noun-heavy or off-topic text yields []. This is a port of Brubru's production classifier, not a trained multi-label model.

Install

pip install "brubru-eurovoc[local]"      # [local] pulls sentence-transformers

The distribution is named brubru-eurovoc (the name eurovoc was already taken on PyPI), but the import name is eurovoc:

import eurovoc

The package itself only needs numpy; the [local] extra adds the model. The first classify() downloads the model (~1 GB) and computes the label-embedding matrix once, caching it under ~/.cache/eurovoc/.

Usage

import eurovoc

for d in eurovoc.classify("Markets in crypto-assets regulation"):
    print(d.label, "|", d.domain, d.domain_label, "|", round(d.score, 3))
# financial instrument | 24 FINANCE | 0.88 ...

eurovoc.classify("Regulació de la protecció de dades personals")  # multilingual
eurovoc.classify("xyzzy plugh")   # -> []  (gate rejects noise)

Each result is a Descriptor(id, label, score, mt, domain, domain_label). The 21 domains are in eurovoc.DOMAINS.

Interop with the Brubru API

Enrich the raw descriptors the API (or the brubru SDK) returns:

import eurovoc
tags = eurovoc.from_descriptors(extract_item["eurovoc_descriptors"])

Or classify a live EU URL through Brubru's hosted extract engine (needs the brubru SDK and a key):

pip install "brubru-eurovoc[brubru]"

tags = eurovoc.classify_url("https://environment.ec.europa.eu/news_en", api_key="brubru_live_...")

Configuration (env vars)

EUROVOC_ST_MODEL, EUROVOC_TOPK, EUROVOC_MIN_SCORE, EUROVOC_MIN_MARGIN, EUROVOC_MIN_CLUSTER, EUROVOC_CACHE_DIR.

Tests

pip install -e '.[test,local]'
pytest -m "not model"     # fast: enrichment, pruning, packaging (no model)
pytest -m model           # loads the model and classifies real text

MIT licensed. Built by Beresol BV. EuroVoc is a trademark of the Publications Office of the European Union.