Dimensions relies on the unpaywall data set to flag articles as Open Access and for the full text button. If a publication is not included there, then a full text button is not shown. 

Definition of Open Access filters

If you are using the Free Dimensions version or Dimensions Plus, you will have access to five OA filters, described below.

Closed

No freely available copy has been identified
All OA
Freely available copy is available
Gold
Free copy available on the publisher page, with or without an open licence
Green, Accepted & Submitted
Free copy of accepted or submitted version (or where version is unknown) in an OA repository
Green, PublishedFree copy of published version in an OA repository


If you are using Dimensions Analytics, you will have access to eight OA filters, described below.

All OA
Freely available copy is available
Pure Gold
Version Of Record (VOR) is free under an open licence from a fully OA journal
Hybrid
Version Of Record (VOR) is free under an open licence in a paid-access journal
Bronze
Article freely available on publisher page, but without an open licence
Green, Published
Free copy of published version available in an OA repository
Green, Accepted
Free copy of accepted version available in an OA repository
Green, Submitted
Free copy of submitted version (or where version is unknown) available in an OA repository
Closed
No freely available copy has been identified