Operating Environments

The IDMS Data Adapter operates in conjunction with FOCUS in the MVS, OS/390, and VM/CMS operating environments. The data adapter can also run in a cross-machine environment: FOCUS on CMS can retrieve data from MVS, MSO, and VSE/ESA^®.

The IDMS Data Adapter is entirely compatible with Computer Associates IDMS Release 12.0 and above.

Generally, the data adapter and FOCUS operate with IDMS data sources that reside in the same environment. In the MVS environment, IDMS data sources are accessed through the MVS version of FOCUS under TSO or in batch. In the CMS environment, the VM/CMS version of IDMS is used with the VM/CMS version of FOCUS. In this case, the IDMS data source consists of one or more CMS files that reside on a CMS minidisk. The CMS version of IDMS creates and maintains these CMS files. The object-time subschemas used are found in the CMS files.

• The data adapter can operate in IDMS local mode or Central Version (CV). IDMS determines the operation mode based on the existence (at execution time) of the IDMS Central Version System Control file (SYSCTL DDname) in MVS or based on the IDMSOPTI module parameters in CMS.
• The data adapter does not require language pre-compilers. Communication with IDMS software is established at run time. The data adapter dynamically generates calls to IDMS.