TMDEL - Table Manager Directory Element

      CONTROL BLOCK NAME = DFHTMDEL
      DESCRIPTIVE NAME = CICS TS Table Manager Directory Element
           Licensed Materials - Property of IBM
            Restricted Materials of IBM 
           5655-Y04
           (C) Copyright IBM Corp. 1992, 1995 
      FUNCTION =
          The table management directory element is a set of pointers
          that address members of chains of directory elements and a
          pointer to the corresponding directory segment. SKTFDEA in
          the table points to the first directory element and DIRGNCHN
          in each directory element points to its successor.
          DIRGPCHN points back to the predecessor and is 0 if at the
          front of the chain
      LIFETIME =
          Since directory elements are grouped into directory segments,
          see the prolog for DFHTMDSG (directory segment) for details
          about storage allocation.
          Storage for a directory element will last for the duration
          of a CICS run though, if a table entry is deleted then its
          corresponding directory element will be marked as reusable
          and placed on a chain of free directory elements.
      STORAGE CLASS =
          Shared storage above the 16M line.
      LOCATION =
          SKTFDEA in the scatter table points to the first directory
          element, and DIRGNCHN in each directory element points to
          its successor.
          DIRELEMA in a directory segment points to the start of a
          group of directory elements.
          SKTFRDE in the scatter table points to the first free
          directory element. Subsequent free directory elements are
          chained together by the DIROWCHN field in the directory
          element.
      INNER CONTROL BLOCKS = None.
      NOTES :
       DEPENDENCIES = S/370
       RESTRICTIONS = None.
     ------------------------------------------------------------------
      EXTERNAL REFERENCES = None.
        CONTROL BLOCKS = None.
        GLOBAL VARIABLES (Macro pass) = None.
     ------------------------------------------------------------------

         Directory element information

         Directory entry key