Stepwise supplement: results of rule-based mappings, validations, and indices (CE–SDG Framework)

This supplementary file provides detailed results and documentation of the stepwise development, validation, and analysis process for the rule-based mapping of Circular Economy (CE) indicators to the Sustainable Development Goals (SDGs). It ensures full transparency, reproducibility, and traceability of the framework, aligned with the STAI³RS principles.The file includes:<b>Initial Keyword List (Post-Internal Refinement)</b> – The list of keywords developed after internal expert review.<b>Round 1 Mapping Results</b> – Rule-based NLP mapping results using the initial keyword list.<b>Prompt-Grounded Mapping Results</b> – Outputs from ChatGPT-4o used as a second validation layer.<b>Discrepancy Detection: Round 1 vs AI-Assisted Mapping</b> – Identification of mismatches between the two rounds.<b>Discrepancy Analysis Summary</b> – A concise summary of SDG- and match-level differences and resolution steps.<b>Annotated Initial Keyword List</b> – Marked changes made following the second validation layer.<b>Updated Keyword List</b> – The final refined list of keywords post-validation.<b>Keyword Coverage and Frequency Analysis</b> – Analytical insights into keyword effectiveness and distribution.<b>Detailed Results for Baseline SDG Coverage Index (BSCI)</b> – Full results of the baseline index calculations.<b>Detailed Results for SDG Coverage Strength Index (SCSI) and Sensitivity Analysis</b> – Comprehensive reporting of the robustness metrics and sensitivity outcomes.