> For the complete documentation index, see [llms.txt](https://xylem.gitbook.io/xylem-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xylem.gitbook.io/xylem-docs/2.-core-features/2-core-features.md).

# Core Features Overview

This section deep-dives into the standard features of the Xylem engine. Click on any section to see technical details and API references:

* [MVCC & Transactions](/xylem-docs/2.-core-features/2-core-features/mvcc-and-transactions.md) — Isolated writing, transactional locking, conflict resolution, and assertions.
* [Graph Traversal](/xylem-docs/2.-core-features/2-core-features/graph-traversal.md) — Custom graph pathing query clauses to read/write complex path networks.
* [Vector Search (HNSW)](/xylem-docs/2.-core-features/2-core-features/vector-search-hnsw.md) — High performance vector indexing, on-demand ingestion, and similarity pruning.
* [Blob Store & CAS](/xylem-docs/2.-core-features/2-core-features/blob-store-and-cas.md) — Blake2b hashing, deduplication, transparent blob columns, reference counts, and partial updates.
* [Reactivity & Pub/Sub](/xylem-docs/2.-core-features/2-core-features/pubsub-and-virtual-columns.md) — Active row watching, callbacks, and virtual column communication.
* [Security & Encryption](/xylem-docs/2.-core-features/2-core-features/security-and-encryption.md) — Multi-key on-the-fly encryption/decryption of rows.