Explains how statements and attachments are linked in the xAPI.

statement-attachment.md

The statements are linked to the attachment via the sha2 property inside the statement's attachment property and the X-Experience-API-Hash header inside the attachment part of the request/response. Please see the example request body below.

--abcABC0123'()+_,-./:=?
Content-Type:application/json

{
  "attachments": [{
    "usageType":"http:\/\/id.tincanapi.com\/attachment\/supporting_media",
    "display":{
      "en-US":"myfile.txt"
    },
    "contentType":"plain\/text",
    "length":4,
    "sha2":"AAA"
  }],
  "actor": {
    "mbox":"mailto:[email protected]"
  },
  "verb": {
    "id":"http://www.example.com/verb"
  },
  "object": {
    "id":"http://www.example.com/object"
  }
}
--abcABC0123'()+_,-./:=?
Content-Type:plain/text
Content-Transfer-Encoding:binary
X-Experience-API-Hash:AAA

Some text

Statement link

    "sha2":"AAA"

Attachment link

X-Experience-API-Hash:AAA