# OBJECTS Docs

> Build user friendly physical design apps with OBJECTS

## Docs

- [Data](/protocol/data): The data layer defines schemas for content in the OBJECTS protocol. It specifies Asset, Project, and Reference, the core primitives that enable interoperability across applications.
- [Identity](/protocol/identity): The identity layer provides portable, user-owned identities for the OBJECTS protocol. Users can create an identity using passkeys, associate human-readable handles, and optionally link wallet addresses for payments.
- [Protocol](/protocol): The OBJECTS protocol specification. These are the rules that clients implement to participate in the network.
- [Sync](/protocol/sync): The sync layer provides content-addressed data synchronization for the OBJECTS protocol. It handles blob transfer, metadata reconciliation, and sync discovery, enabling data to move seamlessly between devices and collaborators without central coordination.
- [Transport](/protocol/transport): The transport layer provides peer-to-peer connectivity for the OBJECTS protocol. It handles connection establishment, NAT traversal, and peer discovery using QUIC, a modern transport protocol built on UDP.
- [Introduction](/overview): OBJECTS is an open protocol & network for developing physical design apps
- [Discovery](/network/discovery): This section covers the mechanisms for finding peers and content on the OBJECTS network.
- [Network](/network): Public services that power the OBJECTS network. Connect to these to register identities, discover peers, and sync data.
- [Index](/network/indexing): This section covers the indexing infrastructure that enables content discovery and lookup across the network.
- [Registry](/network/registry): This section covers the registry and directory services used for registering and looking up identities across the OBJECTS network.
- [Relay](/network/relay): This section covers the relay infrastructure that forwards data between peers when direct connections aren't possible.
- [App](/app): Building applications on OBJECTS