TRANSACTION_HANDLE     The TRANSACTION_HANDLE keyword followed by
    var                    a host language variable. A transaction
                           handle identifies a transaction. If
                           you do not supply a transaction handle
                           explicitly, RDML uses the default
                           transaction handle.

    ss-handle              A segmented string handle. A name that
                           identifies the segmented string.

    ss-field               A qualified field name that refers to a
                           field defined with the SEGMENTED STRING
                           data type. Note that this field name, like
                           all field names in a FOR statement, must
                           be qualified by its own context variable.
                           This second context variable must match
                           the variable declared in the outer FOR
                           statement. See the Examples entry.

    on-error               The ON ERROR clause. Specifies host
                           language statement(s) to be performed
                           if an error occurs during the STORE
                           operation. For more information see the
                           entry on ON ERROR.

    assignment             Associates the two database variables with
                           a value expression. The database variables
                           refer to the segment of a segmented string
                           and its length. The special name for
                           the segment can be either "VALUE" or
                           "RDB$VALUE". The special name for the
                           segment length can be either "LENGTH"
                           or "RDB$LENGTH". You cannot assign any
                           other database variables to the value
                           expressions for segmented strings. The
                           assignment operator for RDML Pascal is
                           ":=" and for RDML C is "=" or strcpy.