README.md

metadata

license: mit
language:
  - de
library_name: sentence-transformers
pipeline_tag: sentence-similarity
tags:
  - sentence-transformers
  - sentence-similarity
  - information retrieval
  - education
  - competency
  - course
widget: []

isy-thl/multilingual-e5-base-course-skill-tuned

Overview

The isy-thl/multilingual-e5-base-course-skill-tuned is a finetuned version of the intfloat/multilingual-e5-base model. The primary goal of this finetuning process was to enhance the model's capabilities in information retrieval, specifically for identifying the most relevant skills associated with a given course description in the German language.

Capabilities

• Enhanced Skill Retrieval:
  • The model excels at identifying and retrieving the most relevant skills for a given course description in German, which can be leveraged for various applications in educational technology.
• Multilingual Capability:
  • While optimized for German, the underlying base model intfloat/multilingual-e5-base supports multiple languages, making it adaptable for future multilingual finetuning endeavors.
• Scalability:
  • The model can handle input sequences up to 512 tokens in length, making it suitable for processing comprehensive course descriptions.

Limitations and Considerations

• Language Limitation:
  • The finetuning was specifically targeted at German language content. While the base model supports multiple languages, this particular finetuned version may not perform as well on non-German texts without additional training.
• Data Bias:
  • The performance and reliability of the model are dependent on the quality of the annotated data in the training dataset. Any biases present in the training data may affect the model's output.
• Retrieval Scope:
  • The model is optimized for educational contexts and may not generalize as effectively to other domains without further finetuning.

Performance

• Coming soon

Usage

Sentence Similarity

from sentence_transformers import SentenceTransformer
import numpy as np
from sklearn.metrics.pairwise import cosine_similarity

# Download from the 🤗 Hub
model = SentenceTransformer("isy-thl/multilingual-e5-base-course-skill-tuned")
# Run inference
query  = [['query: ','WordPress Grundlagen\n Dieser Kurs vermittelt grundlegende Fähigkeiten zur Erstellung eines Web-Blogs in Wordpress. Sie lernen WordPress zu installieren...']]
corpus = [['passage: ','WordPress'],
          ['passage: ','Website-Wireframe erstellen'],
          ['passage: ','Software für Content-Management-Systeme nutzen']]
query_embeddings = model.encode(query)
corpus_embeddings = model.encode(corpus)
similarities = cosine_similarity(query_embeddings,corpus_embeddings)
retrieved_doc_id = np.argmax(similarities)
print(retrieved_doc_id)

Information Retrieval

First install the langchain and chromadb library:

pip install -U langchain
pip install -U langchain-community
pip install -U chromadb

Then you can load this model, create a vectordatabase and run semantic searches.

from langchain_community.embeddings import HuggingFaceBgeEmbeddings
from langchain.vectorstores import Chroma

# Download model and set embed instructions.
embedding = HuggingFaceBgeEmbeddings(
    model_name='isy-thl/multilingual-e5-base-course-skill-tuned',
    query_instruction='query: '',
    embed_instruction='passage: '
)

# Load your documents.
documents = ...

# Create vector database.
db = Chroma.from_documents(
    documents=documents,
    embedding=embedding,
    collection_metadata={'hnsw:space': 'cosine'},
)

# Search database for closest semantic matches.
query = 'WordPress Grundlagen\n Dieser Kurs vermittelt grundlegende Fähigkeiten zur Erstellung eines Web-Blogs in Wordpress. Sie lernen WordPress zu installieren...'
db.similarity_search_with_relevance_scores(query, 20)

Finetuning Details

Finetuning Dataset

• The model was finetuned on the German Course Competency Alignment Dataset, which includes alignments of course descriptions to the skill taxonomies of ESCO (European Skills, Competences, Qualifications and Occupations) and GRETA (a competency model for professional teaching competencies in adult education).
• This dataset was compiled as part of the WISY@KI project, with major contributions from the Institut für Interaktive Systeme at the University of Applied Sciences Lübeck, the Kursportal Schleswig-Holstein, and Weiterbildung Hessen eV. Special thanks to colleagues from MyEduLife and Trainspot.

Finetuning Process

• Hardware Used:
  • Single NVIDIA T4 GPU with 15 GB VRAM.
• Duration:
  • 2000 data points: ~15 minutes.
• Training Parameters:

  torchrun --nproc_per_node 1 \
  -m FlagEmbedding.baai_general_embedding.finetune.run \
  --output_dir multilingual_e5_base_finetuned \
  --model_name_or_path intfloat/multilingual-e5-base \
  --train_data ./course_competency_alignment_de.jsonl \
  --learning_rate 1e-5 \
  --fp16 \
  --num_train_epochs 5 \
  --per_device_train_batch_size 4 \
  --dataloader_drop_last True \
  --normlized True \
  --temperature 0.02 \
  --query_max_len 512 \
  --passage_max_len 64 \
  --train_group_size 4 \
  --negatives_cross_device \
  --logging_steps 10 \
  --save_steps 1500 \
  --query_instruction_for_retrieval ""
  

Model Details

Model Description

• Model Type: Sentence Transformer
• Base Model: intfloat/multilingual-e5-base
• Maximum Sequence Length: 512 tokens
• Output Dimensionality: 768 tokens
• Similarity Function: Cosine Similarity
• Language: German
• License: MIT

Full Model Architecture

SentenceTransformer(
  (0): Transformer({'max_seq_length': 512, 'do_lower_case': False}) with Transformer model: XLMRobertaModel 
  (1): Pooling({'word_embedding_dimension': 768, 'pooling_mode_cls_token': True, 'pooling_mode_mean_tokens': False, 'pooling_mode_max_tokens': False, 'pooling_mode_mean_sqrt_len_tokens': False, 'pooling_mode_weightedmean_tokens': False, 'pooling_mode_lasttoken': False, 'include_prompt': True})
  (2): Normalize()
)

Framework Versions

• Python: 3.10.12
• Sentence Transformers: 3.0.1
• Transformers: 4.41.2
• PyTorch: 2.3.0+cu121
• Accelerate: 0.32.1
• Datasets: 2.20.0
• Tokenizers: 0.19.1

Acknowledgments

Special thanks to the contributors from the Institut für Interaktive Systeme, Kursportal Schleswig-Holstein, Weiterbildung Hessen eV, MyEduLife, and Trainspot for their invaluable support and contributions to the dataset and finetuning process.

Funding: This project was funded by the Federal Ministry of Education and Research.

Model Card Authors

Pascal Hürten, [email protected]