# Numeric Values

**Any** integral numeric value in the schema may be defined as decimal value or hexadecimal with "0x" prefix. For example, numeric IDs of the messages below are specified using decimal (for first) and hexadecimal (for second).

```
<message name="Message1" id="123">
    ...
</message>

<message name="Message2" id="0x1a">
    ...
</message>
```
