concept stores

Research how it would be possible to allow 3rd-party SPARQL-based endpoints to be added as a new “concept store” (besides Wikipedia and Wikidata).

[ Note: This research follows from a Twitter discussion with Kingsley Uyi Idehen ]

Use cases:

• An organization with a SPARQL-endpoint that wants to use the Conzept UI, to give people an integrated/customizable/augmented view of their knowledge base.

• Allow for adding extra “concept stores” to a Conzept system, so other (more niche) concepts can be presented.

• (more difficult probably) Allow a user to explore an unkown SPARQL-endpoint and render the results in Conzept and allow for full-text searches within that knowledge base (the latter may need more than a SPARQL end-point).

• Add semantic metadata to each Conzept page (explore best practices)
  • test with the OpenLink Structured Data Sniffer extension
  • other links: 1, 2

• Create a list of store-definitions containing:
  • Name
  • Description
  • Website
  • active (boolean)
  • SPARQL-endpoint URL
  • OpenSearch URL (for JSON, and XML?). See also: OpenSearchlight.

• Multi-query support for the autocomplete widget:
  • result merging

• Multi-query support for the search-query results:
  • result merging
  • result ranking
  • result paging

• Integrate a SPARQL-explorer sub-system, like Sparklis
  • git repo
  • NLP query examples
  • sparql-endpoint testing: query all endpoints (note: some endpoints are dead) → then open “sparql explorer 2” in the main-section
  • Handle HTTP GET/POST CORS issues with the SPARQL-endpoints (not sure POST is supported in the current Conzept proxy-service)
  • build steps here

• Adapt internal data structures to allow for handling non-Wikidata entities.

• Adapt field-definitions to allow for non-Wikidata property resolving

• How to 'understand' the SPARQL-endpoint class graph and class properties?
  • Adapt topic classification code to allow for non-Wikidata classification rules.

• Allow the Conzept type-system to handle non-Wikidata-Qid based entity IDs (eg. EntityDocument URLs)

• How to page the results correctly, when combining them from multiple data sources?
  • get total results per data source
  • combine page-N results per data source
  • result ordering in pages
  • understand when to stop querying a data source

• …

• SparqlExplorer (Not used on Conzept. I've been unable to build it from source yet, due to NPM package version dependency issues)
  • git repo

• Wikidata Query Service (self-hosted)
  • Could be used for federated SPARQL querying.

• SQID (Not used on Conzept. This is a Wikidata-specific search/browse tool, based on the Wikidata SPARQL and REST API.)
  • git repo