1.CDO>  RESERVE FIELD /CLOSURE=TO_TOP FIRST_NAME

      In this example, the RESERVE command with the /CLOSURE=TO_TOP
      qualifier reserves the FIRST_NAME field element and all owners
      to the top collection.

    2.CDO>  RESERVE FIELD /CLOSURE=TO_TOP /BRANCH=AUDITOR PRODUCT_NUMBER

      In this example, the RESERVE command with the /CLOSURE=TO_TOP
      qualifier reserves all elements on the path between the top
      collection and field PRODUCT_NUMBER; the /BRANCH qualifier
      creates a branch line AUDITOR descending from PRODUCT_NUMBER.

    3.CDO>  RESERVE FIELD /CLOSURE=TO_TOP PRODUCT_NUMBER(1:AUDITOR:1)

      In this example, the RESERVE command reserves the first version
      in the AUDITOR branch line.

    4.SYSTEM collection
         SOURCE_FILES collection
            FIRST_FILE.C
            SECOND_FILE.C
            INC.H
         DERIVED_FILES collection
            FIRST_FILE.OBJ
            SECOND_FILE.OBJ
            IMAGE_FILE.EXE

      In this example, the code shows a collection hierarchy with
      SYSTEM defined as the top collection. The dependencies in
      SYSTEM are as follows:

      o  IMAGE_FILE.EXE depends on FIRST_FILE.OBJ and SECOND_
         FILE.OBJ.

      o  FIRST_FILE.OBJ depends on FIRST_FILE.C and INC.H.

      o  SECOND_FILE.OBJ depends on SECOND_FILE.C and INC.H.

    5.CDO>  RESERVE FILE_ELEMENT MCS_BINARY /CLOSURE=TO_CLOSURE INC.H

      In this example, the RESERVE command reserves the following
      elements:

      o  Element INC.H

      o  Owners of the element specified, SOURCE_FILES and SYSTEM

      o  Elements that directly or indirectly depend on the element,
         FIRST_FILE.OBJ, SECOND_FILE.OBJ, IMAGE_FILE.EXE

    6.CDO> RESERVE FILE_ELEMENT MCS_BINARY /NOOUTPUT "/ISAM_FILE.DAT"

      In this example, ISAM_FILE.DAT is reserved using the /NOOUTPUT
      qualifier, but the file is not copied into the current context
      directory.