# Page Not Found

The URL `guardian/guardian/standard-registry/policies/policy-creation/introduction/externaltopicblock` does not exist.

You might be looking for one of these pages:
- [externalTopicBlock](https://guardian.hedera.com/guardian/standard-registry/policies/policy-creation/introduction/externaltopicblock.md)
- [extractDataBlock](https://guardian.hedera.com/guardian/standard-registry/policies/policy-creation/introduction/externaldatablock.md)
- [filtersAddOnBlock](https://guardian.hedera.com/guardian/standard-registry/policies/policy-creation/introduction/filtersaddonblock.md)
- [tokenActionBlock](https://guardian.hedera.com/guardian/standard-registry/policies/policy-creation/introduction/tokenactionblock.md)
- [customLogicBlock](https://guardian.hedera.com/guardian/standard-registry/policies/policy-creation/introduction/customlogicblock.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://guardian.hedera.com/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://guardian.hedera.com/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/guardian/standard-registry/policies/policy-creation/introduction/externaltopicblock.md`)
- Use `Accept: text/markdown` header for content negotiation