The syntax models of ESL statements presented in this guide use the following conventions:
keyword YOU_PROVIDE {CHOICE1|choice2} [option1|OPTION2]
| Convention | Meaning | Examples | 
| Bold lowercase words | ESL statement name or keyword. Specify exactly as shown. | 
 key 
 extract | 
| Underlined keywords 
 | Default specification. | 
 enabled|disabled | 
| Bold symbols | Required | ( ) 
 : | 
| Uppercase words | Substitute your own identifiers or values. | 
 KEY_NAME 
 LOOP_NAME | 
| Vertical bar | 
 | Separates choices. | 
 check|uncheck | 
| Square brackets [ ] 
 | Select one or none of the entries in the brackets. In array definitions and references, specify exactly as shown. | 
 [visible|invisible] 
 string ARRAY[N] | 
| Braces { } 
 | Select one of the entries between the braces. | 
 {keyboard|APPLICATION} | 
| Ellipsis . . . 
 | You can repeat the preceding entry any number of times. | 
 [X_CTR Y_CTR] ... |