Key Features

Core API

Core java api providing the following functionality:

• Transactional Java API supporting read, write, and batch transactions.
• Supports building N-ary relationships.
• Automatic reification of binary relationships when expanding them.
• Mutable and extendable schema after loading data.
• Creation of Graql queries

Graql

A high-level declarative query language for Grakn:

• Data definition language formed of define and undefine queries
• Data manipulation language formed of get, aggregate, insert and delete queries
• compute queries supporting graph analytics
• Real-time, query-based reasoning based on rules with lazy, iterable execution
• Full support for general recursive queries

Graql Analytics

Built-in distributed OLAP queries, including:

• Various statistics methods, such as min, max, sum, std, mean and median
• path query that can find one or all shortest paths between two entities
• degree query for computing degree, a commonly used centrality measure that is suitable for knowledge base
• cluster query for identifying connected components in the knowledge base

Grakn Engine

Server providing:

• REST API for querying and mutating knowledge base
• Clustering and scaling
• Bulk loading functionality

Dashboard

Web based knowledge-base visualiser:

• Ability to query knowledge base
• Traverse visual representation of query results
• Visualise detailed information about every concept in the KB
• Get visual explanation of inferred relationships

Migration

Graql based templating language enabling automatic migration from various sources:

• Automated migration from JSON
• Automated migration from SQL
• Automated migration from CSV
• Automated migration from XML

Change Log Since 0.18

• Bug fixes to Core API and Graql
• Improved error messages
• Performance improvements
• Docker support temporarily unavailable. We will be addressing this in the next release.