Wanted: a native XML DBMS (for a single user, single-transaction environment).
Requirements:
- Unlimited number of attributes, elements, and namespaces
- Efficient search (SQL-like and XQuery), full-text indexing for several million documents per base
Desirable:
- low price or gratis
- possible horizontal scalability (into clusters)
- GUI for administration and search
- bindings for major languages (C++, Python, C)
OS: Windows, Linux.
BaseX doesn't cut it because of restrictions on number of attributes.