PhoenixmlDb

Modern embedded XML/JSON document database for .NET

#PhoenixmlDb

PhoenixmlDb is a modern, cross-platform embedded XML/JSON document database for .NET. A spiritual successor to Oracle Berkeley DB XML, it provides native document storage queried with XQuery 4.0. XSLT 3.0/4.0 transforms are available through the REST server.

#Core Features

• XML and JSON storage in the XQuery Data Model (XDM); JSON is stored in its fn:json-to-xml form

• Full XQuery 3.1/4.0 and XSLT 3.0/4.0 — custom engines, no Saxon dependency

• ACID transactions with MVCC via LMDB

• Rich indexing — path, value, full-text, structural, name, and metadata (opt-in via EnableIndexing())

• Document metadata — namespaced, typed name/value pairs on every document

• Embeddable to distributed — single-process to multi-node cluster

#Documentation

• Core Concepts — Containers, documents, the XDM, shredded storage

• Documents & Storage — Storing and retrieving XML and JSON

• JSON Support — JSON storage, queries, and indexing

• Indexing — All index types and optimization strategies

• Transactions — ACID guarantees, MVCC, and transaction patterns

• Reads During Writes — One committed version per read; read transactions; limits on readers and running queries

• Resource Access — What queries and stylesheets may read beyond the stored documents

• XQuery Library Modules — Importing library modules from files and http(s) URLs

• Dates and Times — UTC everywhere; accepted date-time forms, API key expiry, date value indexes

• Deployment — Embedded, server, and cluster modes

• API Reference — Interfaces, classes, and patterns