How to use crossref.org API URL, /works/{doi}/transform/{mime}, for DOI content negotiation?

crossref.org API URL /works/{doi}/transform/{mime} allows you to use the DOI Content Negotiation service to request a particular representation of metadata associated with a given DOI.

The above API URL is a variation of /works/{doi}/transform without using the "Accept: {mime}" request header. So the following two requests will give you the same response:

GET https://api.crossref.org/works/{doi}/transform/{mime} HTTP/1.1

GET https://api.crossref.org/works/{doi}/transform HTTP/1.1
Accept: {mime}

DOI Content Negotiation supports the following MIME types for different representations:

MIME Type                               Representation
--------------------------------------- ------------------------
application/rdf+xml                     RDF XML
application/vnd.citationstyles.csl+json Citeproc JSON
application/vnd.crossref.unixref+xml    Crossref Unixref XML
application/vnd.crossref.unixsd+xml     Crossref UNIXSD XML
application/x-bibtex                    BibTeX
application/x-research-info-systems     RIS
text/turtle                             RDF Turtle
text/x-bibliography                     Formatted text citation

Here is an example of how to use the DOI Content Negotiation service to get the BibTeX string of a given DOI:

fyicenter$ curl https://api.crossref.org/works/10.5555/12345678/transform/application/x-bibtex 

@article{Carberry_2008,
  doi = {10.5555/12345678},
  url = {https://doi.org/10.5555%2F12345678},
  year = 2008,
  month = {aug},
  publisher = {Test accounts},
  volume = {5},
  number = {11},
  pages = {1--3},
  author = {Josiah Carberry},
  title = {Toward a Unified Theory of High-Energy Metaphysics: Silly String Theory},
  journal = {Journal of Psychoceramics}

Here is another example of how to use the DOI Content Negotiation service to get the Citeproc JSON format of a given DOI:

fyicenter$ curl https://api.crossref.org/works/10.1037/0003-066x.59.1.29/transform/application/vnd.citationstyles.csl+json

{
  "DOI": "10.1126/science.169.3946.635",
  "ISSN": [
    "0036-8075",
    "1095-9203"
  ],
  "URL": "http://dx.doi.org/10.1126/science.169.3946.635",
  "alternative-id": [
    "10.1126/science.169.3946.635"
  ],
  "author": [
    {
      "affiliation": [
        {
          "name": "University of Pittsburgh, Mellon Institute of Carnegie-Mellon University"
        }
      ],
      "family": "Frank",
      "given": "Henry S.",
      "sequence": "first"
    }
  ],
  "container-title": "Science",
  "container-title-short": "Science",
  "content-domain": {
    "crossmark-restriction": false,
    "domain": []
  },
  "created": {
    "date-parts": [
      [
        2006,
        10,
        5
      ]
    ],
    "date-time": "2006-10-05T12:56:56Z",
    "timestamp": 1160053016000
  },
...

⇒ crossref.org API - /works Updates

⇐ crossref.org API - /works/{doi}/transform

⇑ Crossref.org DOI Database

⇑⇑ DOI - Frequently Asked Questions