Araştırma Makalesi

Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models

Cilt: 8 Sayı: 1 29 Haziran 2026
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Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models

Öz

Unstructured corporate documents, such as invoices and inventory reports, pose significant challenges for automated data extraction and analysis. This study proposes an end-to-end framework that transforms text-based PDF documents into highly structured CSV datasets using domain-specific regular expressions (regex) and data mining techniques, bypassing the need for optical character recognition (OCR). To validate the analytical consistency of the extracted data, descriptive statistical analyses, feature engineering, and customer segmentation were performed. Subsequently, the structured datasets were utilized as knowledge bases for five distinct large language models (LLMs), including GPT-5, Gemini 2.5, Grok 4, Qwen3-Max, and DeepSeek-V3.1 to evaluate their natural language query performance. A comparative analysis based on concrete question-answering scenarios revealed that while well-structured data significantly enhances LLM accuracy, overall performance is heavily constrained by the models' context length limits and multi-row reasoning capabilities. GPT-5 and Gemini 2.5 achieved the highest success rates. Ultimately, the findings demonstrate that coupling traditional data mining techniques with generative AI provides a highly reliable approach for transforming unstructured corporate documents into queryable decision-support systems.

Anahtar Kelimeler

Kaynakça

  1. Abdullah, M. H. A., Aziz, N., Abdulkadir, S. J., Alhussian, H. S. A. and Talpur, N. (2023), Systematic literature review of information extraction from textual data: recent methods, applications, trends, and challenges, IEEE Access, 11, 10535–10562. https://doi.org/10.1109/ACCESS.2023.3240898
  2. Bergling, O. (2025), A case study: How useful are RAG-LLM systems for enterprises?, Master’s thesis, University of Skövde, Skövde, Sweden.
  3. Cherguelaine, A. (2023), Company documents dataset, Kaggle, https://www.kaggle.com/datasets/ayoubcherguelaine/company-documents-dataset, Accessed: 25.06.2026.
  4. Gaikwad, S.V., Chaugule, A. and Patil, P. (2014), Text mining methods and techniques, International Journal of Computer Applications, 85(17), 42-45. https://doi.org/10.5120/14937-3507
  5. Lu, S., Su, Y., Zhang, X., Chai, J. and Yu, L. (2025), LLM-infused bi level semantic enhancement for corporate credit risk prediction, Information Processing & Management, 62(4), 104091. https://doi.org/10.1016/j.ipm.2025.104091
  6. Mohammed, H. H. (2019), Multi-label classification of text documents using deep learning, Master’s thesis, Cankaya University, Ankara, Türkiye.
  7. Rafidhul Haque, I. C. (2025), Implementation of retrieval-augmented generation (RAG) and large language models (LLM) for a document and tabular-based chatbot system, Journal of Electronics Technology Exploration, 3(1), 19–23. https://doi.org/10.52465/joetex.v3i1.588
  8. Scius-Bertrand, A., Jungo, M., Vögtlin, L., Spat, J. M. and Fischer, A. (2024), Zero-shot prompting and few-shot fine-tuning: Revisiting document image classification using large language models, Lecture Notes in Computer Science, 15319, Springer, Cham. https://doi.org/10.1007/978-3-031-78495-8_10

Ayrıntılar

Birincil Dil

İngilizce

Konular

İstatistiksel Veri Bilimi

Bölüm

Araştırma Makalesi

Yayımlanma Tarihi

29 Haziran 2026

Gönderilme Tarihi

18 Nisan 2026

Kabul Tarihi

29 Haziran 2026

Yayımlandığı Sayı

Yıl 2026 Cilt: 8 Sayı: 1

Kaynak Göster

APA
Sarıtaş, A., Kaya, İ., & Şora Günal, E. (2026). Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models. Nicel Bilimler Dergisi, 8(1), 100-117. https://doi.org/10.51541/nicel.1932954
AMA
1.Sarıtaş A, Kaya İ, Şora Günal E. Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models. NBD. 2026;8(1):100-117. doi:10.51541/nicel.1932954
Chicago
Sarıtaş, Ali, İlknur Kaya, ve Efnan Şora Günal. 2026. “Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models”. Nicel Bilimler Dergisi 8 (1): 100-117. https://doi.org/10.51541/nicel.1932954.
EndNote
Sarıtaş A, Kaya İ, Şora Günal E (01 Haziran 2026) Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models. Nicel Bilimler Dergisi 8 1 100–117.
IEEE
[1]A. Sarıtaş, İ. Kaya, ve E. Şora Günal, “Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models”, NBD, c. 8, sy 1, ss. 100–117, Haz. 2026, doi: 10.51541/nicel.1932954.
ISNAD
Sarıtaş, Ali - Kaya, İlknur - Şora Günal, Efnan. “Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models”. Nicel Bilimler Dergisi 8/1 (01 Haziran 2026): 100-117. https://doi.org/10.51541/nicel.1932954.
JAMA
1.Sarıtaş A, Kaya İ, Şora Günal E. Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models. NBD. 2026;8:100–117.
MLA
Sarıtaş, Ali, vd. “Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models”. Nicel Bilimler Dergisi, c. 8, sy 1, Haziran 2026, ss. 100-17, doi:10.51541/nicel.1932954.
Vancouver
1.Ali Sarıtaş, İlknur Kaya, Efnan Şora Günal. Transforming Unstructured Corporate Documents into Queryable Knowledge Bases via Data Mining and Large Language Models. NBD. 01 Haziran 2026;8(1):100-17. doi:10.51541/nicel.1932954