SEDNA

Sedna is a free native XML database which provides a full range of core database services - persistent storage, ACID transactions, security, indices, hot backup.

Flexible XML processing facilities include W3C XQuery implementation, tight integration of XQuery with full-text search facilities and a node-level update language.

Main Features :
- Available for free in open source form under Apache License 2.0
- Native XML database system implemented in C/C++
- Support for W3C XQuery language validated by W3C XQuery Test Suite
- Full-text search integrated with XQuery (based on dtSearch)
- Support for a declarative node-level update language
- Support for ACID transactions
- Support for fine-grained XML triggers
- Incremental hot backup
- Indexes (based on B-tree)
- Support for Unicode (utf8)
- SQL connection from XQuery
- XQuery external functions implemented in C
- Database security (users, roles and privileges)