I know this answer is a year late, but I just learned how to do this in 5.8 LTS. The trick is to understand what valid “predicate” values are, e.g. I had to use a DOM inspector on the DM UI to realize that they are actually URIs, here are valid values:

• http://purl.org/dc/terms/ConformsTo
• http://purl.org/dc/terms/IsBasedOn
• http://purl.org/dc/terms/References
• http://purl.org/dc/terms/Replaces
• http://purl.org/dc/terms/Requires

So, to query the relations of a document with the API, do the following:

• request method POST
• URL path /nuxeo/api/v1/automation/Relations.GetRelations
• request header “Accept: application/json+nxentity,/”
• request header “Content-Type: application/json+nxrequest”

Your request body should be like this:

{
 "input":"/default-domain/workspaces/mydoc",
 "context":{},
 "params":{
    "predicate":"http://purl.org/dc/terms/References",
    "outgoing":false
  }
}

Notes:

• input JSON parameter identifies the relations for
• params.predicate is one of the URIs from above
• params.outgoing: true=return outgoing relations from this document, false=return incoming relations to this document

hope that helps!

Hi,

did you find an answer? I encounter a similar issue.

Thanks