//! * [`MemoryStore`](store/memory/struct.MemoryStore.html): a simple in memory implementation.
//! * [`RocksDbStore`](store/rocksdb/struct.RocksDbStore.html): a file system implementation based on the [RocksDB](https://rocksdb.org/) key-value store.
//! It requires the `"rocksdb"` feature to be activated.
//! The `"rocksdb"` requires the [clang](https://clang.llvm.org/) compiler to be installed.
//! The [clang](https://clang.llvm.org/) compiler needs to be installed to compile RocksDB.
//! * [`SledStore`](store/sled/struct.SledStore.html): another file system implementation based on the [Sled](https://sled.rs/) key-value store.
//! It requires the `"sled"` feature to be activated.
//! Sled is much faster to build than RockDB and does not require a C++ compiler.
//! However, Sled is still in developpment, less tested and data load seems much slower than RocksDB.
//!
//! It also provides a set of utility functions for reading, writing and processing RDF files.
//! Oxigraph also provides a set of utility functions for reading, writing and processing RDF files.
//!
//! Usage example with the [`MemoryStore`](store/memory/struct.MemoryStore.html):