Cross-Environment Access

A number of options are available to extend the range of FOCUS reporting in one environment to IDMS data sources that reside in another:

• You can access MVS, VM, or VSE/ESA IDMS data sources with FOCUS running under MVS or VM/CMS using Computer Associates' Distributed Database System (DDS) package. The data adapter uses the data source table name and DDS node name specified in the Access File to call the local IDMS CV to access a second operating system through DDS. No special FOCUS software is required.
• You can access MVS IDMS data sources from FOCUS running in a host VM environment on the same machine. This facility is available through Computer Associates' Universal Communications Facility (UCF). The use of this facility is transparent to FOCUS.
• You can access MVS or VSE/ESA IDMS data sources with FOCUS running under CMS using the FOCUS Cross Machine Interface (XMI). FOCUS residing in environment A with the IDMS Data Adapter issues a call to the XMI facility residing in environment B with the IDMS data sources. The IDMS/XMI facility issues standard calls to IDMS running in environment B without special Computer Associates software. Communication between the environments is aided by a virtual, real, or channel-to-channel adaptor dedicated to IDMS record-at-a-time retrieval.

In all possible scenarios, the Master and Access File and FOCEXEC procedures, must reside in the FOCUS environment.