To request dynamic allocation by dsname, use verb code 01 and the appropriate text unit key for the dsname allocation function that you require.
A suggested approach to setting up your dsname text unit keys is to code the applicable JCL DD statement and then look up the text unit keys you need, by JCL DD statement parameter, in Table 1. The table is arranged by JCL parameter, and provides the equivalent text unit mnemonic, text unit key and the topic on which the text unit is described.
Table 1 is provided to help you translate your text units by text unit key.
For dsname allocation text units that do not have a JCL equivalent, see Table 1 and Non-JCL dynamic allocation functions.