The guiding principles of FAIR data aim to facilitate the discovery, integration and analysis of relevant datasets by humans and machines by making them Findable (F), Accessible (A), Interoperable (I) and Reusable (R) (Wilkinson, M. D. et al). As a community resource, we strive to produce FAIR resources, disseminate regular updates of our data, support multiple methods for accessing, querying and downloading the data in various formats and provide documentation both for scientists and programmers. The formal FAIRness assessment results for PRO are presented below.

Metric	Requirement	Resource	Resource data/content
F1A	IRI for a registered identifier scheme for your resource's IRI	PURL schema	PURL schema
		http://purlz.org	http://purlz.org
F1B	IRI to a document describing the persistency policy for the identifier of this data	http://purlz.org	http://purlz.org
			https://lod.proconsortium.org/rdf.html#uri
F2	IRI for machine-readable metadata for the resource	https://lod.proconsortium.org/releases/latest/void.ttl	https://lod.proconsortium.org/PR_000025934
	IRI to file format for this metadata	https://www.w3.org/TR/void/	https://www.w3.org/TR/void/
F3	Is the resource identifier specified in the metadata?	Yes	Yes
F4	URL to a search engine indexing your resource	https://www.google.com	https://www.google.com
	Search query/terms	"Protein Ontology" -> First hit	"PR_000025934" -> First hit
A1.1	URL to the description of the protocol	HTTP	HTTP
		https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol	https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol
	Is the protocol open?	Yes	Yes
	Is the protocol (royalty) free?	Yes	Yes
A1.2	Is authorization required to access the content of your resource?	No	No
A2	URL to metadata longevity plan	https://lod.proconsortium.org/release.html	Provided at the dataset level
I1	URL to a specification language	RDFS and OWL ontology	RDFS and OWL ontology
		https://www.w3.org/TR/rdf-schema/	https://www.w3.org/TR/rdf-schema/
		https://www.w3.org/TR/owl2-overview/	https://www.w3.org/TR/owl2-overview/
I2	Maximum 3 IRIs for vacabularies used within the (meta)data	http://purl.org/dc/terms/	dcterms:title "PRO Linked Open Data"@en
		http://www.w3.org/ns/dcat#	dcat:keyword "Protein Ontology"^^xsd:string, "Linked Open Data"^^xsd:string
		http://www.w3.org/2004/02/skos/core#	void:linkPredicate skos:closeMatch
I3	URL to a LinkSet (https://www.w3.org/TR/void/) for the resource	https://lod.proconsortium.org/releases/latest/void.ttl	Provided at the dataset level
R1.1	URL to license/terms of use for the resource	https://creativecommons.org/licenses/by/4.0/
R1.2	Maximum 3 IRIs used to describe the provenance of the resource	http://purl.org/dc/terms/	dcterms:accrualPeriodicity freq:quarterly
		http://xmlns.com/foaf/0.1/	dcterms:publisher [ foaf:page ]
		http://purl.org/pav/	pav:hasCurrentVersion :prolod60_0
	Maximum 3 IRIs used to describe domain information	http://purl.obolibrary.org/obo/pr#	oboInOwl:hasSynonymType pr:PRO-short-label
		http://purl.obolibrary.org/obo/	obo:PR_Q7TMZ5
		http://www.geneontology.org/formats/oboInOwl#	oboInOwl:hasSynonymType pr:PRO-short-label
R1.3	IRI that represents certification from a recognized authoriry	http://yummydata.org	Provided at the dataset level