A sequence-to-sequence translation model that translates text from Italian 🇮🇹 to English 🇬🇧. This repository hosts an ONNX-converted version of Helsinki-NLP/opus-mt_tiny_ita-eng, packaged for use with the Teradata mldb.ONNXSeq2Seq BYOM function.

This repository does not redistribute the original model weights. It contains only:

onnx/model-fp32.onnx — full-precision ONNX graph
tokenizer.json — repacked Marian tokenizer suitable for BYOM
config.json — model architecture metadata, copied unchanged from the upstream repo
generation_config.json — generation defaults, copied unchanged from the upstream repo

A weight-only int8-quantized variant is also published as onnx/model-int8.onnx. Use model-fp32.onnx unless deployment size is a constraint.

For the original PyTorch weights and training details, see the upstream model: Helsinki-NLP/opus-mt_tiny_ita-eng.

Specifications


Source language	Italian 🇮🇹 (`it`)
Target language	English 🇬🇧 (`en`)
Architecture	MarianMT (encoder-decoder)
Max input tokens	256
Max output tokens	512
ONNX file size	177 MB (fp32) / 95 MB (int8)
ONNX opset	14
ONNX IR version	8 (BYOM 7.0+ compatible)
License	Apache-2.0 (from upstream)
Reference	https://huggingface.co/Helsinki-NLP/opus-mt_tiny_ita-eng

Generation parameters are configurable at SQL time via the mldb.ONNXSeq2Seq USING clause through Const_* keys: Const_min_length, Const_max_length, Const_num_beams, Const_length_penalty, Const_repetition_penalty. They are not fixed in the ONNX graph. (num_return_sequences is the exception — it's baked into the graph as 1.)

Quickstart: Deploying this Model in Teradata

Requires Teradata 17.20+ with BYOM 7.0.0.4 or newer (the conversion targets ONNX IR version 8, which BYOM 7.0.x requires).

Note on schema name: the SQL example below uses mldb.ONNXSeq2Seq. On modern Teradata deployments BYOM is installed in the td_mldb database — adjust the schema prefix in the SQL accordingly.

python

import getpass
import teradataml as tdml
from huggingface_hub import hf_hub_download

repo_id  = "Teradata/opus-mt_tiny_ita-eng"
model_id = "opus-mt_tiny_ita-eng"          # used as BYOM model_id

# 1. Download artifacts from this repo
hf_hub_download(repo_id=repo_id, filename="onnx/model-fp32.onnx", local_dir="./")
hf_hub_download(repo_id=repo_id, filename="tokenizer.json",       local_dir="./")

# 2. Connect to Teradata
tdml.create_context(
    host=input("host: "),
    username=input("user: "),
    password=getpass.getpass("password: "),
)

# 3. Load model + tokenizer into BYOM tables
tdml.save_byom(model_id=model_id, model_file="onnx/model-fp32.onnx",
               table_name="translation_models")
tdml.save_byom(model_id=model_id, model_file="tokenizer.json",
               table_name="translation_tokenizers")

# 4. Translate
query = f"""
SELECT id, sequences
FROM mldb.ONNXSeq2Seq(
    ON (SELECT id, txt FROM your_input_table) AS InputTable
    ON (SELECT model_id, model FROM translation_models
         WHERE model_id = '{model_id}') AS ModelTable DIMENSION
    ON (SELECT model AS tokenizer FROM translation_tokenizers
         WHERE model_id = '{model_id}') AS TokenizerTable DIMENSION
    USING
        Accumulate('id')
        ModelOutputTensor('sequences')
        SkipSpecialTokens('true')
        OutputLength(512)
        OverwriteCachedModel('true')
        Const_min_length(1)
        Const_max_length(64)
        Const_num_beams(4)
        Const_length_penalty(1.0)
        Const_repetition_penalty(1.0)
) AS t
"""
print(tdml.DataFrame.from_query(query))

How this model was converted

This model was produced with the open-source teradata-opus-translate package, which exports the encoder/decoder, stitches in the BeamSearch op, applies weight-only int8 quantization, and verifies parity against PyTorch on a small sample set.

Note: the same package can convert any Helsinki-NLP MarianMT model (including ones not in this collection) to a BYOM-ready ONNX bundle. If you have a translation pair that's not published here, install the package and run:

python
1from teradata_opus_translate import convert_model, convert_tokenizer 2 3convert_model( 4 "Helsinki-NLP/<your-model>", 5 output_path="model-fp32.onnx", 6) 7convert_tokenizer( 8 "Helsinki-NLP/<your-model>", 9 output_path="tokenizer.json", 10)

The resulting model-fp32.onnx and tokenizer.json are ready to deploy with the Quickstart flow above.

Disclaimer

DISCLAIMER: The content herein ("Content") is provided "AS IS" and is not covered by any Teradata Operations, Inc. and its affiliates ("Teradata") agreements. Its listing here does not constitute certification or endorsement by Teradata.

To the extent any of the Content contains or is related to any artificial intelligence ("AI") or other language learning models ("Models") that interoperate with the products and services of Teradata, by accessing, bringing, deploying or using such Models, you acknowledge and agree that you are solely responsible for ensuring compliance with all applicable laws, regulations, and restrictions governing the use, deployment, and distribution of AI technologies. This includes, but is not limited to, AI Diffusion Rules, European Union AI Act, AI-related laws and regulations, privacy laws, export controls, and financial or sector-specific regulations.

While Teradata may provide support, guidance, or assistance in the deployment or implementation of Models to interoperate with Teradata's products and/or services, you remain fully responsible for ensuring that your Models, data, and applications comply with all relevant legal and regulatory obligations. Our assistance does not constitute legal or regulatory approval, and Teradata disclaims any liability arising from non-compliance with applicable laws.

You must determine the suitability of the Models for any purpose. Given the probabilistic nature of machine learning and modeling, the use of the Models may in some situations result in incorrect output that does not accurately reflect the action generated. You should evaluate the accuracy of any output as appropriate for your use case, including by using human review of the output.