BaseX

BaseX is an open-source, native XML database and XQuery processor designed for storing, querying, and managing XML data. Implemented in Java, it runs on major operating systems including Windows, macOS, and Linux, and is optimized for large-scale XML collections. It provides a compact storage engine, advanced indexing options, and a highly efficient query processor for fast evaluation of complex XML queries.

Key features include native storage of XML, flexible indexing (path, value, and full-text), transaction-safe updates, and support for standard XML query languages such as XQuery and XPath. The system includes a lightweight query optimizer and efficient execution for complex queries, enabling expressive data retrieval and transformation within XML-centric workloads.

Interfaces and integration: BaseX ships with a graphical user interface, a command-line interface, and a RESTful API, as well as a WebDAV interface and a Java API for embedding in applications. The built-in GUI assists with database management, data import and export, and query development, while the REST and WebDAV options support integration with other systems and services.

Usage and ecosystem: BaseX is used in research, digital humanities, and enterprise contexts for XML-centric data management, metadata repositories, and XQuery-driven analytics. It is maintained as an open-source project with an active user community and documentation, and is frequently cited as a lightweight, high-performance option for XML data storage and querying.