The structured field introducers produced for the LISTDATASET subcommand with OUTPUT=FIELDS are:

<Begin DATASET Group>
  <DSN  - Data Set Name            : 44, character         >
  <CJBN - Job Name                 :  8, character         >
  <VOL  - Volume Serial            :  6, character         >
  <OWN  - Owner                    :  8, character         >
  <DSEQ - Data Set Sequence        :  4, bin(31)           >
  <TZ   - Time Zone                :  4, bin(31)           >
  <DEV  - Device Number            :  4, character         >
  <FILE - Physical File Sequence   :  4, bin(31)           >
  <CDTJ - Create Date              :  4, packed decimal    >
  <CTM  - Create Time              :  4, packed decimal    >
  <SYS  - Creating system ID       :  8, character         >
  <BLKS - Block Size               :  4, bin(31)           >
  <BLKC - Block Count              :  4, bin(31)           >
  <LRCL - Logical Record Length    :  4, bin(31)           >
  <RCFM - Record Format            :  4, character         >
  <DC   - Data Class               :  8, character         >
  <DLWJ - Date Last Written        :  4, packed decimal    >
  <DLRJ - Date Last Read/Referenced:  4, packed decimal    >
  <STEP - Step Name                :  8, character         >
  <DD   - DD Name                  :  8, character         >
  <MC   - Management Class         :  8, character         >
  <SG   - Storage Group Name       :  8, character         >
  <SC   - Storage Class            :  8, character         >
  <VMV  - VRS Management Value     :  8, character         >
  <RTDJ - Retention Date           :  4, packed decimal    >
  <VTYP - Primary VRS Type         :  1, bin(8)            >
  <VJBN - Primary VRS Job Name     :  8, character         >
  <VNME - Primary VRS Name         : 44, character         >
  <VSCN - Primary VRS Subchain name:  8, character         >
  <VSCD - Primary VRS Subchain date:  4, packed decimal    >
  <VRSR - VRS Retained             :  1, bin(8)            >
  <NME  - Security Class Name      :  8, character         >
  <CLS  - Security Class Descriptio: 32, character         >
  <ABND - Abend while open         :  1, bin(8)            >
  <CTLG - Catalog status           :  1, bin(8)            >
  <2JBN - Secondary VRS jobname mas:  8, character         >
  <2NME - Secondary VRS mask       :  8, character         >
  <2SCN - Secondary VRS subchain na:  8, character         >
  <2SCD - Secondary VRS subchain da:  4, packed decimal    >
  <BLKT - Total block count        :  4, bin(31)           >
  <CPGM - Creating program name    :  8, character         >
  <LPGM - Last used program name   :  8, character         >
  <LJOB - Last used job            :  8, character         >
  <LSTP - Last used step name      :  8, character         >
  <LDD  - Last used DD name        :  8, character         >
  <LDEV - Last Drive               :  4, character         >
  <DPCT - Percent of volume        :  1, bin(8)            >
  <XDTJ - Expiration Date          :  4, packed decimal    >
  <XDSB - Expiry date set by       :  1, bin(8)            >
  <OXDJ - Original Expiration Date :  4, packed decimal    >
  <DSS6 - Data Set Size            : 14, compound          >
  <LCDJ - Last Change Date         :  4, packed decimal    >
  <LCTM - Last Change Time         :  4, packed decimal    >
  <LCID - Last Change User ID      :  8, character         >
  <LCSI - Last Change System ID    :  8, character         >
  <LCUD - Last "User" Change Date  :  4, packed decimal    >
  <LCUT - Last "User" Change Time  :  4, packed decimal    >
  <DLTD - Deleted By Disposition Pr:  1, bin(8)            >
  <VEX  - VRSEL Exclude            :  1, bin(8)            >
  <BESK - CA Tape Encrytion key ind:  4, bin(31)           >
  <PSZ6 - Physical space used      : 14, compound          >
  <CRAT - Compression ratio        :  4, bin(31)           >
  <BLK6 - Total Block Count        :  8, bin(64)           >
  <LRED - LASTREF extra days       :  4, bin(31)           >      
<End DATASET Group>