Grakn Core 0.17.0 (no longer supported)

Setup Changes

• Grakn Server now started with following command: grakn server start
• Graql console started with following command: graql console
• Migration started using following command: graql migrate

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Graql

• Resource renamed to Attribute
• ResourceType renamed to AttributeType
• Relation renamed to Relationship
• RelationType renamed to RelationshipType
• Types and Schema Concepts are no inserted with define. Data continues to be inserted with insert. For example:

define person sub entity;
insert $s isa person;

• Rules are now part of the schema. For example defining a rule is now:

define my-rule sub rule when {...} then {...};

• Match queries now known as get queries must now end with get. For example:

match $x isa person; get; 
match $x has name $xn; ($x, mother: $y); $y has name $yn; get $xn, $yn; 

• Introduced as syntax for more easily accessing links between entities and attributes. This is to make data provenance easier. For example:

match $x isa person has name "Bob" as $r; get $r; 

• Optimised queries for getting attributes of entity
• Optimised queries which involve traversing subs
• Improved error messages on Graql shell
• Several reasoning optimisations and bug fixes

Core

• GraknGraph renamed to GraknTx
• Optimised insertions
• Bug fixes when creating keyspaces
• Changed to OpenJDK 8. Oracle JDK no longer required
• Core API returns Streams rather than Collections
• Updated Persistence layer
• Batched commit log submissions in order to improve performance
• Faster transaction and session initialisation using cached properties.
• Remove redundant validation leading to write improvements

Analytics

• Analytics now takes into account optimised attribute structures

Engine

• Improved internal queuing system
• More user notifications during migration processes
• Fixed memory leak in task queue
• Fixed several migration failures

Dashboard

• Several Bug Fixes
• Changed to Yarn to manage dependencies