This Natural profile parameter specifies information concerning the physical database file to be associated with a logical system file. It corresponds to the macro NTLFILE in the Natural parameter module.

Possible settings	See LFILE Parameter Syntax.
Default setting	none
Dynamic specification	yes	This parameter can only be specified dynamically. In the Natural parameter module, the macro NTLFILE is used instead.
Specification within session	no
Application programming interface	USR0011N	See SYSEXT - Natural Application Programming Interfaces in the Utilities documentation.
	USR2004N (recommended)

Notes:

• LFILE and NTLFILE can be used for products which have their own system files (for example, Con-nect, Natural Review) to specify where such a system file is to be located. Such products use the database ID 255 and a logical file number in their data definition modules (DDMs). With the LFILE parameter or the macro NTLFILE, you specify which physical file number and database ID (and, if applicable, password and cipher key) are associated with that logical file number. Natural maps the logical file number to the physical file number and database ID and uses it for any database calls.

• LFILE is especially useful for defining a scratch-pad file with the logical file number 212; see also the profile parameter ROSY, Natural Scratch-Pad File in the Operations documentation, and Defining a Scratch-Pad File in the Installation for z/OS documentation.

The following topics are covered below:

• LFILE Parameter Syntax

• NTLFILE Macro Syntax

• Example of LFILE Parameter

• Examples of NTLFILE Macro

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LFILE Parameter Syntax

The LFILE parameter is specified as follows:

LFILE=(logical-fnr,physical-dbid,physical-fnr,password,cipher-key,[RO])

Where:

Syntax Element	Value	Explanation
logical-fnr	1 - 251	Logical file number. This parameter is mandatory.
physical-dbid	0 - 65535, except 255	Physical database ID. Database ID 255 is reserved for logical system files.
physical-fnr	1 - 65535	Physical file number.
password	1 - 8 characters.	Password and cipher key are only required if the database file has been password-protected and/or ciphered using the Adabas security feature.
cipher-key	8 numerical digits.
RO	n/a	Flag for read-only access.

NTLFILE Macro Syntax

The NTLFILE macro is specified as follows:

         NTLFILE logical-fnr,physical-dbid,physical-fnr,password,cipher-key,RO

Notes:

1. For an explanation of the syntax elements and for possible values, see LFILE Parameter Syntax.
2. To define different logical files, the LFILE parameter or the NTLFILE macro must be specified several times; see Examples of NTLFILE Macro.

Example of LFILE Parameter

LFILE=(180,73,10),LFILE=(251,40,9,TEST99)

Examples of NTLFILE Macro

         NTLFILE 180,73,10
         NTLFILE 251,40,9,TEST99