# Reference Guides

- [How Competitive Pattern Analysis Works](/saas/configuration/tags/data-discovery/reference-guide/sdd-scoring.md): Learn how competitive pattern analysis assesses your data to apply column tags
- [Built-in Identifier Reference](/saas/configuration/tags/data-discovery/reference-guide/improved-pack-built-in-identifier-reference.md): Understand the common data types built-in identifiers detect and tag
- [Built-in Identifier Changelog](/saas/configuration/tags/data-discovery/reference-guide/improved-pack-built-in-identifier-reference/built-in-identifier-changelog.md): Keep track of the updates made to the built-in identifiers