This location previously contained the pre-final/draft of FAPI-R / FAPI1-Baseline.
The final approved version of that document can be found here:
https://openid.net/specs/openid-financial-api-part-1-1_0-final.html
The latest working version of the document (which may contain errata not yet officially published) can be found here:
https://bitbucket.org/openid/fapi/src/master/FAPI_1.0/openid-financial-api-part-1-1_0.md