J28-6169, 02.06.04

The text read off it

[02.06.04]

Checkpoint Files

Name        Type    Description

file.name   FILE    CHECKPOINT

Description of File Options and Requirements
- a) The order in which options are exercised on the FILE card is critical only in that the options exercised for a particular record must be listed following the record.name and prior to the introduction of another record.name.
- b) Detail Description of FILE options and requirements
```
{INPUT      }
{OUTPUT     }
{CHECKPOINT }
```
The description of the file must specify one of these three types. If a file is designated as CHECKPOINT it may have no other usage.
```
[ ,{BCD}    ]
[  {BINARY} ]
```
The specification states the mode in which an input file is to be read or an output file written. If no specification is made the file is assumed to be BCD.
```
[ ,{CARD} ]
[  {TAPE} ]
```
CARD is specified if the on-line card reader or card punch is the processing unit. When CARD is specified BEGIN is assumed, i.e., each record starts at the beginning of a physical block. With this option only columns 1 through 72 are read. For the most efficient handling of card input a GROUP card should be used when more than two cards constitute a record. If no specification is made TAPE processing is assumed.
```
,BLOCKSIZE nn
```
nn is an integer representing the size of the largest block to be output or the maximum number of words to be input from an input block. This specification must be made. All input card files must have a block size of at lease 24 words. Maximum blocksize is 9999 words.
```
[ ,ON ERROR statement.name.1 ]
```
Statement.name.1 references a procedure statement name in the Commercial Translator program to which transfer will be made if the system is unable to recover from an input error. (See Section 02.07).