Supplementary material for a systematic review on NLP-based semantic search for information retrieval in administrative documents

Formal supplementary material and UTF-8 CSV data accompanying the systematic review on NLP-based semantic search for information retrieval in administrative documents. The PDF summarizes the screening flow, eligibility outcomes, extraction structure, methodological-confidence classification, aggregate frequencies, coding boundaries, citation traceability, and sensitivity analysis for 48 included studies published from 2021 to 2025. The CSV files provide tabular data for count verification, study-level inspection, and reuse. Abstracts and full texts are not redistributed.