Informix Software Inc, Menlo Park, California has done a deal with the Answer Systems Division of Sterling Software Inc, Dallas, Texas for a joint devlopment that will enable users of Informix databases to access IBM mainframe databases. The software will make it possible for Informix users to select, download and store data from mainframe databases such as IBM’s own IMS, DB2, and IDMS, Total and Datacom/DB, and file formats such as VSAM and SAM. Informix is developing the end that will reside with the Informix database application on MS-DOS or Unix systems, and Sterling will license application program interface software to Informix that will enable its new product to interface via Structured Query Language with Answer Systems’ Answer/Extractor server software on the IBM mainframe. The software will be compatible across Informix’s full SQL-based line – but Informix doesn’t expect it to be ready until the second half of next year.