# Sources

The tier and category framework is based on *Zi Wei Dou Shu Jing Cheng* (紫微斗数精成), using *Zi Wei Dou Shu Quan Shu* (紫微斗數全書) as the underlying classical framework. Annual-deity placement conventions are identified separately in the site metadata.

Individual records retain a source reference so users can distinguish a page-level classical citation from the dataset-wide classification source. These references document provenance; they are not a claim to reproduce, license, or republish the source texts.