Year 2000 compliance

Description.

All VSSI software is YEAR2000 compliant. This means that all VSSI components support a 4 digit year format. The actual format used is defined at installation time and can be modified via CP commands or by configuration file parameters at IPL time.

VM releases supported.

VSSI YEAR2000 compliance is supported in all z/VM releases

Date format supported.

The following date formats are supported by VSSI YEAR2000 compliance. When applicable the corresponding IBM format name is specified in parentheses.

MM/DD/CCYY - (FULLDATE)

DD/MM/CCYY

CCYY/MM/DD - (ISODATE)

CCYY/DD/MM

MM/DD/YY - (SHORTDATE) This is the default at installation.

DD/MM/YY

YY/MM/DD

YY/DD/MM

Installation default.

The installation default is SHORTDATE.

VSSI Date commands.

The following CP commands have been implemented to support the VSSI YEAR2000 compliance: (See the VPARS or VTAPE User's guide for the full command syntax)

• VSSet with the following arguments:

  • VSSet DATEFormat { Anyone of the 8 formats defined above }

  • VSSet { Anyone of the 3 predefined IBM format names }

  • VSSet DELimiter { any character }

• VSQuery with the following argument:

  • VSQuery DATEFormat

Principle of operation.

The default date format is specified during installation by modifying the VSOPTNS Macro.

Online code.

After installation the default date format can be modified by:

• Including the VSI_DATEFormat statement in the VSSI system configuration file. (See the installation guide)

• Issuing the VSSset command with the appropriate parameters.

CMS code.

The default date format, from the VSOPTNS macro, is included in all CMS modules created at installation time. When a CMS module executes, it requests the current date format from the CP using the VSQuery commsnd. If the online date format is available, the CMS module will use it. If the request fails, the CMS module will use the default format.