This extension allows uploading ReqIF files as attachments, and parsing them so that requirements are considered as local requirements.
It doesn't "support ReqIF" but it supports a subset of the specification, i.e. the definition of requirements and their properties.
The feedback we have is that customers wish to update the requirements once the file is uploaded. But the file, as an attachment, can't be modified by Requirement Yogi. Therefore it has low popularity.
It can be downloaded at: https://marketplace.atlassian.com/apps/1222948/reqif-extension-for-requirement-yogi?hosting=server&tab=overview
This extension is described thoroughly on API section: Requirement Yogi - ReqIF extension