HyperGraphDB 介绍
HyperGraphDB 是一个可用于一般应用环境下的强大的存储系统，基于 directed hypergraphs
理论构建，提供持久化的内存模型设计、AI 和语义网络，可作为 Java 项目的嵌入式面向对象数据库或者图形数据库、或者是 NoSQL 数据库。
主要特点：
- Powerful data modeling and knowledge representation.
- Graph-oriented storage.
- N-ary, higher order relationships (edges) between graph nodes.
- Graph traversals and relational-style queries.
- Customizable indexing.
- Customizable storage management.
- Extensible, dynamic DB schema through custom typing.
- Out of the box Java OO database.
- Fully transactional and multi-threaded, MVCC/STM.
- P2P framework for data distribution.
JavaDoc: http://www.hypergraphdb.org/docs/javadoc/index.html