The pattern is constructed using alternation (|) to match each specific item exactly. Special characters are escaped where necessary:
1. URLs: Escaped special characters like ?, &, #, [], and . 
2. Datetime strings: Escaped . and + in the timezone offset
3. Quoted strings: Escaped quotes and backslashes
4. Credit card numbers: Escaped hyphens and handled spaces
5. Passwords: Used literal characters since they're fixed strings
6. Special patterns: Escaped special regex characters like {, }, and +
7. Email pattern: Escaped { and }
8. Simple text: Added as literal string

The pattern is anchored for each alternative using positive lookahead to ensure we only match the exact strings in their entirety.