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Lean Library Access - Alternatives feature
How does Lean Library extension find DOIs on a page?
How does Lean Library extension find DOIs on a page?

The Alternatives feature uses Digital Object Identifiers (DOI) on a page, to discover alternative access, including OpenAccess for you.

Daniel Horvath avatar
Written by Daniel Horvath
Updated over a week ago

What is a DOI?

The Digital Object Identifier (DOI) is a persistent identifier for journal articles (and often eBooks and their chapters). A DOI typically looks like this: 10.1109/5.771073

How does DOI enable Lean Library extension?

The Lean Library extension will identify DOIs within a page and then attempt to find you an alternative access path, if available through your university or through OpenAccess. You'll find a full description here.

How are DOIs identified on a page?

We utilise the meta-tags present in the source of a page (hidden from view) and in particular look for meta-tags like this:

<meta name="citation_doi" content="10.1016/j.scitotenv.2017.12.027">

Additional meta names we are looking for are:

'doi', 'dc.doi', 'dc.identifier', 'dc.identifier.doi', 'bepress_citation_doi', 'rft_id', 'dcsext.wt_doi', etc.

Some websites do not offer these meta-tags and for these, a sophisticated regular expression can be used.

If Library Library extension does not identify a DOI on a page

Please contact us at and provide us with an example of the page, the DOI present and we will look into this.

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