Open Access books

The data concerning the UNIL books published in Open Access with the support of the SNSF were collected from the SNSF P3 database.

Open Access support

OA rate

Definition of each type of Open Access:

  • Gold: publication immediately available in OA (at the time of publication) in its published version. For articles, this refers to publising in pure Gold OA journals (all articles in the journal are OA).
  • Hybrid: publication available immediately in OA (at the time of publication) in its published version. It differs from Gold in that the journal (for articles) or the book (for chapters) also publishes subscription-based content that is not openly accessible.
  • Green and Green (embargo): publication available in OA often after an embargo period and in a version prior to the published one (in most cases the postprint, or the author's accepted version but not formatted by the publisher). These publications are found exclusively in institutional repositories, such as SERVAL, or subject repositories.
  • Bronze: publications initially accessible by subscription or payment which are made available on the publisher's website after a period of time. These publications are not strictly Open Access, as they do not allow sharing or reuse. Furthermore, the publisher may at any time decide to close access to these works.
  • Closed: publications accessible by subscription or for a fee (paywall).

The analysis of the OA rate is carried out by enriching the data in SERVAL with the Unpaywall database.

  1. A complete extraction of SERVAL is made on 31/12 of each year for UNIL/CHUV public records.
  2. The data is enriched with Open Access data from Unpaywall for records with a perennial identifier, DOI, in January.
  3. The data is imported and processed in Tableau.
  4. A calculation is performed in Tableau for each record in order to to assign it an OA status:


  • [Oa Status]= Result obtained from Unpaywall.
  • [Document principal?]= Bolean variable indicating the presence (1, TRUE) or absence (0, FALSE) of a PDF in SERVAL.
  • [Document principal disponible?]= Bolean variable indicating whether the potential embargo on the PDF has expired (1, TRUE) or not (0, FALSE).


IF [Oa Status]="gold" THEN "Gold"
ELSEIF [Oa Status]="hybrid" THEN "Hybrid"
ELSEIF [Oa Status]="bronze" THEN "Bronze"
ELSEIF [Oa Status]="green" THEN "Green"
ELSEIF [Oa Status]="closed" AND [Document principal?]="FALSE" THEN "Closed"
ELSEIF [Oa Status]="closed" AND [Document principal?]="TRUE" AND [Document principal disponible?]="FALSE" THEN "Green (Embargo)"
ELSEIF [Oa Status]="closed" AND [Document principal?]="TRUE" AND [Document principal disponible?]="TRUE" THEN "Green"
ELSEIF IFNULL([Oa Status],"closed")="closed" AND [Document principal?]="FALSE" THEN "Closed"
ELSEIF IFNULL([Oa Status],"closed")="closed" AND [Document principal?]="TRUE" AND [Document principal disponible?]="FALSE" THEN "Green (Embargo)"
ELSEIF IFNULL([Oa Status],"closed")="closed" AND [Document principal?]="TRUE" AND [Document principal disponible?]="TRUE" THEN "Green"

  1. These results can be subsequently filtered and displayed by year of publication, faculty, type of publication, etc. (information from SERVAL).

Change in the OA rate

This graph is produced by performing the "OA rate" analysis and displaying the results by year of publication.

PDF downloads in SERVAL

The tracking of downloads in SERVAL is done by Google Analytics. The data is filtered by Google Analytics to eliminate automatic download bots.

The Google Analytics data is imported and combined with SERVAL data in Tableau.

PDF downloads in SERVAL in 2020

The figures displayed in the report correspond to the PDFs downloaded from SERVAL (excluding automatic download bots) for full texts and are displayed in reverse chronological order. A dynamic graph can be viewed on the SERVAL section of the Open Science website.

Normalised downloads (download/PDFs) are also shown to compare different types of publications and their average usage. The calculation (total number of downloads divided by the number of PDFs in SERVAL) is made for each type of publication.

The increase (in %) refers is calculated with respect to the previous year.

This value does not show the distribution of the number of downloads.

The top five UNIL/CHUV most downloaded works published in 2020

This list is generated by ranking works published in 2020 (all types) by their number of downloads in 2020.