The pattern is constructed using alternation to match each specific item:
1. Email addresses: Escaped special characters like dots and plus signs
2. Phone numbers: Escaped parentheses and specific spacing patterns
3. ID and dates: Used escaped # and different date separators
4. IPv6: Used colons and zeros pattern, with double colon abbreviation option
5. AA-BB-AA pattern: Used exact matching with hyphens

Each pattern is made specific enough to match only the target items and not similar but invalid entries in the text. Used alternation (|) to combine all patterns.