The Structure of a Book on Sefaria

Each book on Sefaria is represented by an Index. Each book has one, and only one Index associated with it.

Each version of a text (a translation, a different edition etc) is represented by a Version object. A book will have a single Index associated with it. A Index could have no Version objects associated, but it will generally have one or more Version objects associated with it.

For a deep dive on Index and Version, see Index and Versions.

Each Index is supported by a schema to represent the structure of that book, and provides important structural and metadata information regarding the book. To take a deep dive into this structure, read about the Index Schema.