Content-Based Discovery at /catalogs Level

At the catalog level, answers are derived from summary metadata about the entities listed within a resource (typically a catalog or a resource that contains multiple sub-resources). Queries at this level are based on the EJP RD metadata schema adapted to certain specific filters. The following table shows an overview of the filters used at the catalog level, as defined in the EJP RD VP API Specification [link]. This endpoint is most suitable for the querying of catalogs (i.e., resources that are lists of other resources).

The filters shown in the table below can be applied to a query to only show certain results.

Filters supported by the API endpoint: /catalogs (click for the full specification)

Metadata Concept	EJP RD Beacon v2 API Filter Term	Usage notes	EJP RD Beacon v2 Filter Type	Expected Response
Disease or Disorder	dcat:theme	All RDs that are associated within a catalog	Ontology	Result set with metadata
Phenotype	sio:phenotype	HPO terms of all phenotypes observed within a catalog of RD resources	Ontology	Result set or counts
Resource Types	rdf:type	Types of resources within the catalog	Alphanumerical	Result set
ID		The resource identifier ID within the catalog	Alphanumerical	Result set
Name	dcterms:title	The name of the resource in the catalog	Alphanumerical	Result set
Description	dcterms:description	The description of the resource in the catalog	Alphanumerical	Result set

Please note:

• Resources choose which filters (i.e., metadata concepts) they want to implement for their /catalogs endpoint.