> For the complete documentation index, see [llms.txt](https://docs.wetez.io/wetez/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wetez.io/wetez/developer/appchain/polkadot-parachain.md).

# Polkadot Parachain

A [parachain](https://polkadot.network/parachains/) is an application-specific data structure that is globally coherent and validatable by the validators of the Relay Chain. A parachain will take the form of a blockchain, but there is no specific need for them to be actual blockchains.

## Demo chain

TBD