Table 5. The mapping among the extracted requirements (R01 to R25) based on the responses of the participants to the survey questions (Q1 to Q5) and the research question ( RQ ₁ to RQ ₅).

Additionally, the last column shows how far we have addressed the requirements up to now.

Requirements		Survey Questions					Research Questions					Addressed?
		Q1	Q2	Q3	Q4	Q5v	RQ1	RQ2	RQ3	RQ4	RQ5
R01	Completeness of the ENVRI-KMS search space	X				X	X					Partially
R02	List of the contact persons	X		X			X					Not yet
R03	FAIRness criteria	X	X		X						X	Yes
R04	Entitiy types (private, open-source, etc.)		X				X					Not yet
R05	Recommendations	X	X		X	X				X		Partially
R06	Q&A forums for technical discussions		X		X						X	Not yet
R07	Ontologies and semantic search		X			X				X		Partially
R08	Multilingual queries		X						X	X		Not yet
R09	Source code and API search		X							X		Not yet
R10	Search RI website’s contents		X	X						X		Yes
R11	Standard user interface			X		X				X		Yes
R12	SPARQL queries				X					X		Not yet
R13	High performance and availability				X					X		Partially
R14	APIs to be connected to VREs				X					X		Partially
R15	Automatic knowledge ingestion				X	X		X				Yes
R16	Visualization				X					X		Partially
R17	Image search				X	X				X		Partially
R18	Assessment tools		X		X	X					X	Not yet
R19	Manual knowledge ingestion				X			X				Yes
R20	Updatable knowledge base					X			X			Yes
R21	Geolocation of the search space entities		X			X	X					Not yet
R22	Metadata of the search space entities			X		X	X					Not yet
R23	Continuous integration and continuous delivery					X			X			Yes
R24	Different user categories					X					X	Partially
R25	Categories & classifications			X	X		X					Yes