# Why is a token's Book C smaller than its Book A?

Book A holds whole transactions, Book B the token's regions, Book C only the file's bytes; C ≤ B ≤ A on every entry.

URL: https://blockspace.wiki/answers/why-is-book-c-smaller-than-book-a/

[Book A](https://blockspace.wiki/glossary/book-a/) counts the whole transactions bought for a token, shared where shared. [Book B](https://blockspace.wiki/glossary/book-b/) keeps only the regions its operations wrote, read or moved through. [Book C](https://blockspace.wiki/glossary/book-c/) keeps the artifact bytes alone, with all framing removed. So C ≤ B ≤ A on every entry. A protocol with no artifact body measures zero in Book C.

Sources:

- block.space docs: BTI · https://block.space/docs/bti
- Blockspace Co. records
- block.space docs: measurements · https://block.space/docs/measurements

Updated: 2026-10-21