> For the complete documentation index, see [llms.txt](https://docs.vechain.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vechain.org/developer-resources/how-to-build-on-vechain/read-data.md).

# Read Data

The data within the blockchain is separated into different components, where blocks represent chunks of data continuously added to the chain. Within a block are transactions with instructions and changes, executed by accounts which can be either user or contract controlled.