docs/content/en/reference/azkfilejs/system_name.md
## System Name
Naming systems has the following RegExp restriction:
```
[a-zA-Z0-9-]
```
It follows the naming conventions for Docker containers names. The only exception is that we don't allow the character `_` to be used. That is because `azk` uses the container name to "annotate" some pieces of information, and we use the character `_` as the separator. If you run the command `adocker ps -a` you might see that `azk` container names might look something like this:
```
dev.azk.io_type.daemon_mid.892a5f73fa_sys.azkdemo_seq.1_uid.0bed3aa0c3
```
Also, if you use `-` in your system's name, you must enclose it in quotes.
##### Examples:
```
systems({
"system-name": {
}
})
```
```
systems({
system01: {
}
})
```