Table 1. Final metadata object.

Tabular representation of the python dictionary used to store the metadata, the secondary column items are nested under the primary items where present. Metadata source key: Zr=Zotero raw, S=Scopus, D=doi.org, P=PubMed, Ze=’Extra’ field from Zotero, W=Wikidata, De=Derived. The metadata sources are used in the order they are displayed in the table (left to right), once a value has been found the subsequent sources are not queried.

Primary	Secondary	Source
IDs	DOI	Zr
	PMID	Ze
	Scopus	S
	Hash	De
	Zotero	Zr
Authors	Author list	P/D
	First author	Author list/Ze
	Affiliation	D/P/S/Ze
Location	Canonical institute	De
	Town	W
	Country	W
	Longitude	W
	Latitude	W
Date		P/D/S/Ze/Zr
Title		P/D/S/Zr
Abstract		P
Citations	Scopus citation count	S
Keywords	MeSH	P
	Other	P
Journal	Name	D/P
	Volume	D/P
	Issue	D/P