We are continuously striving to make our API easier to use, by both enriching the information of individual endpoints and also enhancing the documentation on this site. It makes us happy to share the fruits of these efforts with you:

{
  "id": "2b5ffbbb6e01401287a233fb8c411518",
  "displayed_as": "SREF1",
  "$path": "/transactions/2b5ffbbb6e01401287a233fb8c411518",
  // ...
  "origin": {
    "id": "aa27230c07e2458a886c8af580b67cbb",
    "displayed_as": "OB-SREF2",
    "$path": "/sales_quick_entries/aa27230c07e2458a886c8af580b67cbb",
    "links": [
      {
        "href": null,
        "rel": "alternate",
        "type": "text/html"
      }
    ],
    "due_date": "2019-11-09",
    "outstanding_amount": "100.0",
    "currency": {
      "id": "EUR",
      "displayed_as": "Euro (EUR)",
      "$path": "/currencies/EUR"
    },
    "status": {
      "id": "UNPAID",
      "displayed_as": "Unpaid",
      "$path": "/artefact_statuses/UNPAID"
    }
  },
  // ...
}