# E Series and JunosE Text and Syntax Conventions

Table 1 defines notice icons used in this documentation.

Table 1: Notice Icons

Icon | Meaning | Description
--- | --- | ---
| Informational note | Indicates important features or instructions.
| Caution | Indicates a situation that might result in loss of data or hardware damage.
| Warning | Alerts you to the risk of personal injury or death.
| Laser warning | Alerts you to the risk of personal injury from a laser.

Table 2 defines text and syntax conventions that we use throughout the E Series and JunosE documentation.

Table 2: Text and Syntax Conventions

Convention | Description | Examples
--- | --- | ---
Bold text like this | Represents commands and keywords in text. | Issue the clock source command. Specify the keyword exp-msg.
Bold text like this | Represents text that the user must type. | host1(config)#traffic class low-loss1
    Fixed-width text like this
| Represents information as displayed on your terminal’s screen. | host1#show ip ospf 2
    Routing Process OSPF 2 with Router ID 5.5.0.250
    Router is an Area Border Router (ABR)
Italic text like this | Emphasizes words. Identifies variables. Identifies chapter, appendix, and book names. | There are two levels of access: user and privileged. clusterId, ipAddress. Appendix A, System Specifications
Plus sign (+) linking key names | Indicates that you must press two or more keys simultaneously. | Press Ctrl + b.
Syntax Conventions in the Command Reference Guide
Plain text like this | Represents keywords. | terminal length
Italic text like this | Represents variables. | mask, accessListName
| (pipe symbol) | Represents a choice to select one keyword or variable to the left or to the right of this symbol. (The keyword or variable can be either optional or required.) | diagnostic | line
[ ] (brackets) | Represent optional keywords or variables. | [ internal | external ]
[ ]* (brackets and asterisk) | Represent optional keywords or variables that can be entered more than once. | [ level1 | level2 | l1 ]*
{ } (braces) | Represent required keywords or variables. | { permit | deny } { in | out } { clusterId | ipAddress }