vO.7.0 Release Notes

Welcome to two new contributors @Nabil-AL and @kplatis.

This release adds new features and enhancements to Nexus Forge as well as bug fixes.

New Contributors

The following people made their first contributions:

  • Alibou Nabil William (@Nabil-AL): #196

  • Platis Konstantinos (@kplatis): #210

New Features


  • Added support for running forge search queries against ElasticSearch indices and not just SPARQL endpoints. #192, #221 (Try it using the Querying notebook Binder_Querying) When calling forge.search(…), a search_endpoint argument can be set to:

    • elastic to search a configured ElasticSearch search endpoint

    • sparql to search a configured SPARQL endpoint (which is also the default search endpoint when no search_endpoint value is provided).

from kgforge.core import KnowledgeGraphForge
# see https://github.com/BlueBrain/nexus-forge/blob/master/examples/notebooks/use-cases/prod-forge-nexus.yml for a full forge config example.
forge = KnowledgeGraphForge(configuration="./config.yml", **kwargs)
# Search for resources  by type using a dictionary
filters = {"type":"Dataset"} # any supported forge filter syntax can be provided: https://nexus-forge.readthedocs.io/en/latest/interaction.html#querying
results_filters = forge.search(filters, search_endpoint="elastic")

ElasticSearch support in forge.search(…) is based on a kgforge.core.wrappings.Filter to ElasticSearch DSL rewriting strategy completely driven by either a user provided ElasticSearch mapping or by ElasticSearch dynamic field mapping.

When using the BlueBrainNexus store, the ElasticSearch endpoint (an actual ElasticSearch View) to query as well as the (optional) mapping to use can be configured as follows:

  name: BlueBrainNexus
  endpoint: https://sandbox.bluebrainnexus.io/v1
      endpoint: "https://bluebrain.github.io/nexus/vocabulary/defaultSparqlIndex"
      endpoint: "https://bluebrain.github.io/nexus/vocabulary/defaultElasticSearchIndex"
      mapping: "https://bluebrain.github.io/nexus/vocabulary/defaultElasticSearchIndex"
      default_str_keyword_field: "keyword"

For a more detailed forge configuration, see an example available from github.



  • Applied user provided limit and offset arguments with higher priority than:

    • size and from set in a ElasticSearch query when using forge.elastic(…) #192 (issue #176) (Try it using the Querying notebook Binder_Querying)

  • Returned a set of Resource objects as result of a forge.elastic(..) call instead of raw ES hits. ES metadata (_index, _score) are added in _store_metadata. #192 (issue #177) (Try it using the Querying notebook Binder_Querying)


  • Added support for returning resolvers as dictionary. #210 (issue #208) (Try it using the Resolving notebook Binder_Querying)


  • Added a jupyter notebook for accessing data in a BlueBrainNexus Store’s view or tag. (Binder_BBP-KG-Search-and-Download-Data-at-a-given-tag to try it)

  • Added a jupyter notebook for ontology types search and exploration. (Binder_BBP-KG-Search-and-Download-Data-at-a-given-tag to try it)


  • Set python>=3.7, rdflib>=6.0.0, pyshacl==v0.17.2 and pyparsing>=2.0.2. #201, #204, #196 (issue #198) Releases of rdflib>=6.0.0 now includes the plugin rdflib-jsonld, so there is no need to install it separately.

Bug Fixes

  • Added a fix list of JSONLD keys to JSONify (i.e. to remove the @ prefix) to avoid removing @ prefix for JSON-LD literal @value. #200 (issue #194) (Try it using the JSON-LD IO notebook Binder_JSON-LD-IO)

  • Added bucket first resolving of JSON-LD contexts (before attempting to resolve them following their HTTP URI) when using BlueBrainNexus store. This capability avoid failure when initializing a KnowledgeGraphForge session in a closed network such as Openshift pods. #190, #193 (issue #178)

  • Updated BlueBrainNexus store parallel batch requests to avoid tasks parameters overriding. #191


Full changelog.