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Added support for DNS zone files (#1961)
This adds support for DNS zone files. The highlighting is quite simple as every type and class is highlighted as `keyword`. This is intentional as other token names (e.g. `class-name`, `function`, `builtin`, ...) are not highlighted by every theme resulting in large portions of unstyled text for some themes.
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‎components.js

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‎components.json

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"alias": "jinja2",
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"owner": "romanvm"
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},
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"dns-zone-file": {
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"title": "DNS zone file",
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"owner": "RunDevelopment",
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"alias": "dns-zone"
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},
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"docker": {
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"title": "Docker",
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"alias": "dockerfile",

‎components/prism-dns-zone-file.js

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Prism.languages['dns-zone-file'] = {
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'comment': /;.*/,
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'string': {
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pattern: /"(?:\\.|[^"\\\r\n])*"/,
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greedy: true
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},
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'variable': [
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{
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pattern: /(^\$ORIGIN[ \t]+)\S+/m,
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lookbehind: true,
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},
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{
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pattern: /(^|\s)@(?=\s|$)/,
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lookbehind: true,
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}
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],
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'keyword': /^\$(?:ORIGIN|INCLUDE|TTL)(?=\s|$)/m,
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'class': {
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// https://tools.ietf.org/html/rfc1035#page-13
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pattern: /(^|\s)(?:IN|CH|CS|HS)(?=\s|$)/,
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lookbehind: true,
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alias: 'keyword'
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},
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'type': {
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// https://en.wikipedia.org/wiki/List_of_DNS_record_types
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pattern: /(^|\s)(?:A|A6|AAAA|AFSDB|APL|ATMA|CAA|CDNSKEY|CDS|CERT|CNAME|DHCID|DLV|DNAME|DNSKEY|DS|EID|GID|GPOS|HINFO|HIP|IPSECKEY|ISDN|KEY|KX|LOC|MAILA|MAILB|MB|MD|MF|MG|MINFO|MR|MX|NAPTR|NB|NBSTAT|NIMLOC|NINFO|NS|NSAP|NSAP-PTR|NSEC|NSEC3|NSEC3PARAM|NULL|NXT|OPENPGPKEY|PTR|PX|RKEY|RP|RRSIG|RT|SIG|SINK|SMIMEA|SOA|SPF|SRV|SSHFP|TA|TKEY|TLSA|TSIG|TXT|UID|UINFO|UNSPEC|URI|WKS|X25)(?=\s|$)/,
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lookbehind: true,
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alias: 'keyword'
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},
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'punctuation': /[()]/
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};
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Prism.languages['dns-zone'] = Prism.languages['dns-zone-file']

‎components/prism-dns-zone-file.min.js

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‎examples/prism-dns-zone-file.html

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<h2>Full example</h2>
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<pre><code>$TTL 3d
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@ IN SOA root.localhost. root.sneaky.net. (
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2015050503 ; serial
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12h ; refresh
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15m ; retry
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3w ; expire
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3h ; negative response TTL
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)
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IN NS root.localhost.
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IN NS localhost. ; secondary name server is preferably externally maintained
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www IN A 3.141.59.26
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ww1 IN CNAME www</code></pre>

‎plugins/autoloader/prism-autoloader.js

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"dotnet": "csharp",
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"coffee": "coffeescript",
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"jinja2": "django",
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"dns-zone": "dns-zone-file",
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"dockerfile": "docker",
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"gamemakerlanguage": "gml",
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"hs": "haskell",

‎plugins/autoloader/prism-autoloader.min.js

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‎plugins/show-language/prism-show-language.js

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"css-extras": "CSS Extras",
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"django": "Django/Jinja2",
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"jinja2": "Django/Jinja2",
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"dns-zone-file": "DNS zone file",
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"dns-zone": "DNS zone file",
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"dockerfile": "Docker",
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"ebnf": "Extended Backus–Naur form",
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"ejs": "EJS",

‎plugins/show-language/prism-show-language.min.js

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‎tests/languages/dns-zone-file/class_feature.test

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IN
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CH
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CS
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HS
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----------------------------------------------------
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[
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["class", "IN"],
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["class", "CH"],
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["class", "CS"],
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["class", "HS"]
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]
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----------------------------------------------------
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Checks for all resource record classes.

‎tests/languages/dns-zone-file/comment_feature.test

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; comment
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----------------------------------------------------
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[
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["comment", "; comment"]
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]
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----------------------------------------------------
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Checks for comments.

‎tests/languages/dns-zone-file/string_feature.test

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"foo"
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"\""
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----------------------------------------------------
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[
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["string", "\"foo\""],
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["string", "\"\\\"\""]
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]
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----------------------------------------------------
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Checks for strings.

‎tests/languages/dns-zone-file/type_featrue.test

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A
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A6
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AAAA
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AFSDB
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APL
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ATMA
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CAA
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CDNSKEY
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CDS
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CERT
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CNAME
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DHCID
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DLV
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DNAME
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DNSKEY
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DS
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EID
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GID
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GPOS
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HINFO
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HIP
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IPSECKEY
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ISDN
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KEY
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KX
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LOC
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MAILA
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MAILB
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MB
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MD
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MF
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MG
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MINFO
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MR
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MX
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NAPTR
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NB
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NBSTAT
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NIMLOC
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NINFO
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NS
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NSAP
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NSAP-PTR
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NSEC
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NSEC3
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NSEC3PARAM
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NULL
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NXT
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OPENPGPKEY
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PTR
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PX
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RKEY
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RP
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RRSIG
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RT
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SIG
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SINK
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SMIMEA
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SOA
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SPF
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SRV
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SSHFP
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TA
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TKEY
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TLSA
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TSIG
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TXT
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UID
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UINFO
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UNSPEC
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URI
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WKS
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X25
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----------------------------------------------------
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[
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["type", "A"],
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["type", "A6"],
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["type", "AAAA"],
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["type", "AFSDB"],
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["type", "APL"],
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["type", "ATMA"],
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["type", "CAA"],
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["type", "CDNSKEY"],
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["type", "CDS"],
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["type", "CERT"],
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["type", "CNAME"],
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["type", "DHCID"],
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["type", "DLV"],
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["type", "DNAME"],
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["type", "DNSKEY"],
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["type", "DS"],
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["type", "EID"],
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["type", "GID"],
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["type", "GPOS"],
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["type", "HINFO"],
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["type", "HIP"],
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["type", "IPSECKEY"],
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["type", "ISDN"],
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["type", "KEY"],
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["type", "KX"],
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["type", "LOC"],
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["type", "MAILA"],
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["type", "MAILB"],
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["type", "MB"],
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["type", "MD"],
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["type", "MF"],
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["type", "MG"],
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["type", "MINFO"],
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["type", "MR"],
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["type", "MX"],
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["type", "NAPTR"],
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["type", "NB"],
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["type", "NBSTAT"],
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["type", "NIMLOC"],
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["type", "NINFO"],
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["type", "NS"],
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["type", "NSAP"],
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["type", "NSAP-PTR"],
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["type", "NSEC"],
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["type", "NSEC3"],
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["type", "NSEC3PARAM"],
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["type", "NULL"],
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["type", "NXT"],
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["type", "OPENPGPKEY"],
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["type", "PTR"],
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["type", "PX"],
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["type", "RKEY"],
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["type", "RP"],
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["type", "RRSIG"],
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["type", "RT"],
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["type", "SIG"],
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["type", "SINK"],
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["type", "SMIMEA"],
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["type", "SOA"],
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["type", "SPF"],
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["type", "SRV"],
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["type", "SSHFP"],
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["type", "TA"],
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["type", "TKEY"],
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["type", "TLSA"],
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["type", "TSIG"],
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["type", "TXT"],
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["type", "UID"],
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["type", "UINFO"],
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["type", "UNSPEC"],
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["type", "URI"],
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["type", "WKS"],
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["type", "X25"]
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]
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----------------------------------------------------
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Checks for all resource record types.

‎tests/languages/dns-zone-file/variable_feature.test

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$ORIGIN foo.bar.com
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@
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----------------------------------------------------
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[
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["keyword", "$ORIGIN"],
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["variable", "foo.bar.com"],
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["variable", "@"]
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]
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----------------------------------------------------
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Checks for variables.

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