STIndex: A Context-Aware Multi-Dimensional Spatiotemporal Information Extraction System

View PDF HTML (experimental) Abstract:Extracting structured knowledge from unstructured data still faces practical limitations: entity and event extraction pipelines remain brittle, knowledge graph construction requires costly ontology engineering, and cross-domain generalization is rarely production-ready. In contrast, space and time provide universal contextual anchors that naturally align heterogeneous information and benefit downstream tasks such as retrieval and reasoning. We introduce \textbf{STIndex}, an end-to-end system that structures unstructured content into a multidimensional spatiotemporal data warehouse. Users define domain-specific analysis dimensions with configurable hierarchies, while large language models perform context-aware extraction and grounding. \textbf{STIndex} integrates document-level memory, geocoding correction, and quality validation, and offers an interactive analytics dashboard for visualization, clustering, burst detection, and entity network analysis. In evaluation on a public health benchmark, \textbf{STIndex} improves spatiotemporal entity extraction F1 by 4.37\% (GPT-4o-mini) and 3.60\% (Qwen3-8B). A live demonstration and open-source code are available at this https URL. Subjects: Databases (cs.DB); Artificial Intelligence (cs.AI) Cite as: arXiv:2604.08597 [cs.DB] (or arXiv:2604.08597v1 [cs.DB] for this version) https://doi.org/10.48550/arXiv.2604.08597 arXiv-issued DOI via DataCite Submission history From: Wenxiao Zhang [view email] [v1] Tue, 7 Apr 2026 04:42:44 UTC (8,624 KB)