Release Notes

The Ontotext Platform release notes provide information about the features and improvements in each release, as well as various bug fixes. Ontotext Platform’s versioning scheme is based on semantic versioning. The full version is composed of three components:


e.g., 1.2.3 where the major version is 1, the minor version is 2, and the patch version is 3.


Releases with the same major and minor versions do not contain any new features. Releases with different patch versions contain fixes for bugs discovered since the previous minor. New or significantly changed features are released with a higher major or minor version.

Ontotext Platform 3.4.0

Released: 12 April 2021


Ontotext Platform 3.4.0 combines the power of GraphDB, Elasticsearch, and GraphQL by enabling the definition, automatic synchronization, and querying of indexes to boost the performance of specific queries.

  • Declarative Semantic Search Service - Enables SMEs and software engineers to easily use capabilities like Full-text search (FTS), Autocomplete/typeahead, Auto-suggest, Faceted search, complex dashboards using different statistical and/or bucket aggregations over a knowledge graph.

  • Knowledge graph exploration - Provides SMEs with a basic search and exploration user interface in the OTP Workbench.

  • Performance and memory improvements - The new version of the Semantic Object Service delivers up to ten times better performance to execute big and data-intensive GraphQL queries on top of GraphDB.


Ontotext Platform 3.4.0 introduces changes in the way we handle missing values for multi-valued properties in GraphQL. The Platform no longer generates the multi-valued properties as non-nullable arrays by default. Their nullability can be controlled by the nonNullable and nonNullableElements characteristics.


Ontotext Platform version 3.4.0 requires GraphDB version 9.7.0 or later, as well as the required version of Elasticsearch related to the used GraphDB Elasticsearch connector version. You can find a list with all external dependencies here.

New Features

  • Declarative Semantic Search Service

    • Declare search indices

      • Manage Semantic Object Search shape

      • Manage types mapping to Elasticsearch types

      • Apply filters on object

      • Apply default configurations

      • Declare search analyzer

      • Schema validation

      • Declare semantic object as part of parent object index

    • Manage object properties

      • Nested object support

      • Declare nesting level

    • Initialize/update search indexes

      • Automatically generated GraphDB Elasticsearch connectors

        • On schema activation

        • On schema update

      • Synchronized update on GraphDB transaction

    • Search GraphQL endpoint features

      • Support Elasticsearch queries

      • Support Sort and Pagination

      • Support Boost result score

      • Support Fuzzy search

      • Support Elasticsearch aggregations

      • Return data directly from Elasticsearch

    • Automatic federation with the Semantic Object Service

    • Built-in GraphQL search object over all indexes (root_search)

    • Search Service health status

    • Provide Helm charts for the Search Service

Search Service Documentation / Schema Configuration / Tutorial

  • Knowledge Graph Exploration

    • Provide Full-text search (FTS)

    • Provide Autocomplete/typeahead (suggest concepts from the KG)

    • Provide Concept search (search for objects related to the selected concept from the KG)

    • Provide Faceted search over non-string/text properties

    • Display and paginate search results

    • Display object details

    • Explorer-related object details

Workbench Search Documentation


  • Performance and memory improvements

    • Optimize SPARQL result parsing

    • Optimize RBAC model memory footprint

    • Do not generate RBAC directives in the GraphQL schema if not needed

    • Add option to disable statistics

  • Select GraphQL endpoint to be used in Workbench GraphiQL page

  • Support OWL cardinality during schema generation

  • Range validation checks for object properties enforced via SHACL sh:node

  • UNIQ language checks allow only single String without a language

  • Control GraphQL nullability for multi-valued properties

Bug Fixes

  • PLATFORM-3569 Incorrect validation for some IRI values

  • PLATFORM-3369 Wrong type calculation for SOML class with ‘.’ in the name

  • PLATFORM-3340 __typename is not property normalized for classes with prefix

  • PLATFORM-3336 langString: inline fragments causes error 500 without ‘lang:ALL’

  • PLATFORM-3105 Wrong SPARQL query is generated when filtering

  • PLATFORM-3098 License cannot be set using the Workbench

  • PLATFORM-3086 License cannot be uploaded if NTP server is inaccessible

  • PLATFORM-3050 inverseOf error when class and prop use different namespaces

  • PLATFORM-3045 Properties with ‘_’ in the name characteristic can lead to errors

  • PLATFORM-3044 ERROR: Prefix ‘vocab’ does not define correct IRI value

  • PLATFORM-3043 LangString values are not returned when querying _entities

  • PLATFORM-3018 Cannot really disable SHACL in cluster via API call

  • PLATFORM-3008 Do not normalize shape sizes if parent shape has same typeProp

  • PLATFORM-2958 WB does not load if SOaaS is not present or there is a network issue

  • PLATFORM-2956 SHACL in cluster: problem with class’ regex not detected

  • PLATFORM-2943 Fields are not properly merged when not in fragment

  • PLATFORM-2938 Query takes too long

  • PLATFORM-2937 SHACL enable/disable: error 500 with security and SOML not bound

  • PLATFORM-2893 RBAC partial update mutation results in a NPE

  • PLATFORM-2890 Query returns wrong ‘name’ when ‘name’ at different levels is requested

  • PLATFORM-2856 SHACL schema post should return 400 and not 500 when no SOML is bound

  • PLATFORM-2797 Platform vulnerability issue with zookeeper-3.4.14.jar

  • PLATFORM-2749 langString ‘name’: orderBy orders results in unexpected way

  • PLATFORM-2714 Test: Random failing SHACL tests on GDB cluster

  • PLATFORM-2711 GDB: locked when executing rapid SHACL bind/unbind operations

  • PLATFORM-2708 langString + SHACL mutation returns error 500

  • PLATFORM-2686 A case of successfully updated valid to invalid yaml schema

  • PLATFORM-2683 Random failing AC due to ConcurrentModificationException

  • PLATFORM-2517 Update with where: {id: {}} filter fails

Ontotext Platform 3.3

Ontotext Platform 3.3 release notes

Ontotext Platform 3.3 documentation

Ontotext Platform 3.2

Ontotext Platform 3.2 release notes

Ontotext Platform 3.2 documentation

Ontotext Platform 3.1

Ontotext Platform 3.1 release notes

Ontotext Platform 3.1 documentation

Ontotext Platform 3.0

Ontotext Platform 3.0 release notes

Ontotext Platform 3.0 documentation