IMS.OPTIONS data set removal

The IMS.OPTIONS data set removal enhancement simplifies IMS system definition and generation in IMS 15.

The IMS.OPTIONS data set contains only one member, DFSVTAM, which is used to define and set the &DFSVTAM and &DFSBTAM global variables.

The DFSVTAM member is not used during system generation, so the IMS.OPTIONS data set is removed.

Changes to installing and defining IMS

The IMS.OPTIONS data set is not created during IMS system generation.

The following sample installation jobs no longer references the IMS.OPTIONS data set:

DFSALOC1, which allocates target and distribution libraries
DFSDDEF1, which defines SMP/E DDDEFs for the IMS system

The JCL that is generated as the output of stage 1 or during stage 2 no longer references the IMS.OPTIONS data set.

Documentation changes

The following table lists the publications that contain new or changed topics for the IMS.OPTIONS data set removal enhancement. Publications that are not impacted by this enhancement are not included in the table.

Table 1. Links to topics that have new or changed content for this enhancement
Publication	Links to topics
Release planning	IMS.OPTIONS data set removal(new) (this topics)
Installation	System data sets
System definition	IMSGEN macro Allocating XRF data sets IMS stage 1 system definition IMS stage 2 system definition Using multiple IMS systems at the same release level and environment
System administration	Ensuring proper SYSLIB concatenation
System utilities	Running the DFSUTB00 utility