New for V1R11, the MVS prefix support enables you to explicitly specify a prefix for identifying MVS data sets.

All path type resolution (checking) processing uses the presence or absence of a leading slash (/) to indicate whether the path is an absolute or relative path. If the slash is present, the first qualifier after the slash is compared against the MVS prefix to determine if it matches the prefix. If so, then the path type will be considered to be explicitly resolved via the prefix. If no match is found, or no slash was present, the implicit path type resolution heuristic is used. To avoid causing unnecessary customer impacts, the default settings cause the file system type resolution algorithm to give the same results as the resolution algorithm in previous releases.

For more detailed information, see z/OS NFS File System Type Selection.