I'm sure you are all familiar with the IBM Knowledge Center, which has the information for Informix versions 11.5, 11.7, and 12.1. But maybe you are used to seeing the old version 10.0 information center show up in search results.
The Informix information centers for version 10.0, 11.1, and older products have been taken down.
You can still access the documentation, however! There are web pages that link to PDFs or .zip files:
- Informix version 10 documentation
- Informix version 11.1 documentation (this page also has PDFs and release notes for Informix 11.50 and CSDK 3.50 and 3.00)
- Informix publications for older products (this page contains documentation for products like Informix versions 9 and 7, Extended Parallel Server, I-Spy, Enterprise Gateway, and C-ISAM)