The pattern is constructed to match each target item exactly by:
1. Using alternation (|) to separate each distinct item
2. Carefully escaping special regex characters like brackets, parentheses, and quotes
3. Handling complex character sequences like IPv6 addresses and Unicode characters
4. Properly escaping backslashes in regex patterns within the strings
5. Accounting for exact spacing including multiple spaces in the phone number extension

The pattern starts with "regex^example" email, then handles the phone number with exact spaces, the datetime with timezone, the nested brackets structure, the partial JSON object, the regex pattern with its lookarounds, the Arabic URL, another lookaround pattern, the duplicate pattern, and finally the XML tag with complex attributes. Each part is separated by alternation and special characters are properly escaped.