Sample Azure Policy rule to match the URL pattern

tag-like-policy-rule.json

"policyRule": {
  "if": {
    "field": "[[concat('tags[', parameters('tagName'), ']')]", // For example, 'documentation' as the tag name
    "notLike": "https://wiki.contoso.com/*" // To match the URL pattern to an internal Wiki
    // The 'notLike'operator doesn't support multiple wildcards, so 'https://*.contoso.com/*' won't work.
    // If your internal documentation is spread across different sources, then use 'https://*' as a pattern or provide a few possible patterns using logical operators
  },
  "then": {
    // Some policy effect...
  }
}