datacite/orcid_client

{
    "bulk": [
    {
        "work": {
            "title": {
                "title": {
                    "value": "Work # 1"
                },
                "subtitle": null,
                "translated-title": null
            },
            "journal-title": {
                "value": "journal # 1"
            },
            "short-description": null,
            "type": "journal-article",
            "external-ids": {
                "external-id": [{
                    "external-id-type": "doi",
                    "external-id-value": "ext-id-1",
                    "external-id-url": {
                        "value": "http://dx.doi.org/ext-id-1"
                    },
                    "external-id-relationship": "self"
                }]
            }
        }
    }, 
    {
        "work": {
            "title": {
                "title": {
                    "value": "Work # 2"
                },
                "subtitle": null,
                "translated-title": null
            },
            "journal-title": {
                "value": "book title"
            },
            "short-description": null,
            "type": "book-chapter",
            "external-ids": {
                "external-id": [{
                    "external-id-type": "isbn",
                    "external-id-value": "ext-id-2",
                    "external-id-relationship": "part-of"
                }]
            }
        }
    }
    ]
}