Viewing github.com/alecthomas/chroma/lexers/embedded/dns.xml

```
<?xml version="1.0"?>
```
```
<lexer>
```
```
  <config>
```
```
    <name>dns</name>
```
```
    <alias>zone</alias>
```
```
    <alias>bind</alias>
```
```
    <filename>*.zone</filename>
```
```
    <mime_type>text/dns</mime_type>
```
```
  </config>
```
```
  <rules>
```
```
    <state name="root">
```

      <rule pattern="\b(IN|A|AAAA|AFSDB|APL|CAA|CDNSKEY|CDS|CERT|CNAME|DHCID|DLV|DNAME|DNSKEY|DS|HIP|IPSECKEY|KEY|KX|LOC|MX|NAPTR|NS|NSEC|NSEC3|NSEC3PARAM|PTR|RRSIG|RP|SIG|SOA|SRV|SSHFP|TA|TKEY|TLSA|TSIG|TXT)\b">

```
        <token type="Keyword"/>
```
```
      </rule>
```
```
      <rule pattern=";.*(\S|$)">
```
```
        <token type="Comment"/>
```
```
      </rule>
```

      <rule pattern="\b((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d{2}|[1-9]?\d)){3}))|:)))\b">

        <token type="LiteralNumberIntegerLong"/>

```
      </rule>
```

      <rule pattern="\b((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\b">

        <token type="LiteralNumberInteger"/>

```
      </rule>
```
```
      <rule pattern="\b\d+[dhwm]?">
```

        <token type="LiteralStringChar"/>

```
      </rule>
```

      <rule pattern="\b([\w\d.-])+\.($|\s)">

```
        <token type="NameProperty"/>
```
```
      </rule>
```

      <rule pattern="([\w\d\.-]+\.[a-z-]{2,24}\.?|^(@|[\w\d-]+))">

```
        <token type="NameClass"/>
```
```
      </rule>
```

      <rule pattern="^\$(TTL|GENERATE|INCLUDE|ORIGIN)">

```
        <token type="NameAttribute"/>
```
```
      </rule>
```
```
      <rule pattern="$|$">
```
```
        <token type="Punctuation"/>
```
```
      </rule>
```
```
      <rule pattern="[\r\n\s\t]+">
```
```
        <token type="TextWhitespace"/>
```
```
      </rule>
```
```
    </state>
```
```
  </rules>
```
```
</lexer>
```