This tag is appropriate for questions about IBM's products in the Informix family - or any predecessors to those products. Such products include:
- IBM Informix,
To know the actual editions read this IBM technote: Comparing Informix Editions
- Informix Dynamic Server (IDS) (2004-2010),
- Enterprise Edition
- Workgroup Edition
- Express Edition
- Standard Engine (SE),
- Extended Parallel Server (XPS),
- Informix Genero
It also includes questions about the Informix implementations of generic interfaces to the Informix databases, such as ODBC, JDBC, .NET, OLE/DB, ADO, etc.
This list is not exhaustive; there are other esoteric products which it would be legitimate to tag with 'informix'.