Is original-title a string or array?

The JSON schema suggests original-title and other properties to be a simple string. When looking at CrossRef data many of the string properties are arrays which breaks many CSL tools. Is CrossRef simply wrong? Was there a change that made the array a simple string at some point?
curl -LH "Accept: application/vnd.citationstyles.csl+json" http://dx.doi.org/10.1093/database/baw125
{  
  "indexed":{  
    "date-parts":[  
      [  
        2019,
        2,
        16
      ]
    ],
    "date-time":"2019-02-16T13:21:45Z",
    "timestamp":1550323305641
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  "reference-count":46,
  "publisher":"Oxford University Press (OUP)",
  "content-domain":{  
    "domain":[  

    ],
    "crossmark-restriction":false
  },
  "published-print":{  
    "date-parts":[  
      [  
        2016
      ]
    ]
  },
  "DOI":"10.1093\/database\/baw125",
  "type":"article-journal",
  "created":{  
    "date-parts":[  
      [  
        2016,
        10,
        3
      ]
    ],
    "date-time":"2016-10-03T08:40:07Z",
    "timestamp":1475484007000
  },
  "page":"baw125",
  "source":"Crossref",
  "is-referenced-by-count":12,
  "title":"The Global Genome Biodiversity Network (GGBN) Data Standard specification",
  "prefix":"10.1093",
  "volume":"2016",
  "author":[  
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      ]
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      ]
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    {  
      "given":"O.",
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      ]
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      "given":"J.",
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      "sequence":"additional",
      "affiliation":[  

      ]
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      ]
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      "given":"W. G.",
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      "given":"C.",
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      ]
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      "given":"P.",
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      "sequence":"additional",
      "affiliation":[  

      ]
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    {  
      "given":"B.",
      "family":"Gemeinholzer",
      "sequence":"additional",
      "affiliation":[  

      ]
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    {  
      "given":"A.",
      "family":"G\u00fcntsch",
      "sequence":"additional",
      "affiliation":[  

      ]
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      "given":"T.",
      "family":"Hollowell",
      "sequence":"additional",
      "affiliation":[  

      ]
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      "given":"P.",
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      "affiliation":[  

      ]
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    {  
      "given":"I.",
      "family":"Kostadinov",
      "sequence":"additional",
      "affiliation":[  

      ]
    },
    {  
      "given":"R.",
      "family":"Kottmann",
      "sequence":"additional",
      "affiliation":[  

      ]
    },
    {  
      "given":"R. T.",
      "family":"Lawlor",
      "sequence":"additional",
      "affiliation":[  

      ]
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    {  
      "given":"C.",
      "family":"Lyal",
      "sequence":"additional",
      "affiliation":[  

      ]
    },
    {  
      "given":"J.",
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      ]
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      "sequence":"additional",
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      ]
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      "given":"G.",
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      "affiliation":[  

      ]
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    {  
      "given":"T.",
      "family":"Robertson",
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      ]
    },
    {  
      "given":"C.",
      "family":"S\u00f6hngen",
      "sequence":"additional",
      "affiliation":[  

      ]
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    {  
      "given":"J.",
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      "sequence":"additional",
      "affiliation":[  

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      "sequence":"additional",
      "affiliation":[  

      ]
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      "given":"P.",
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      ]
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      "given":"H.",
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      "sequence":"additional",
      "affiliation":[  

      ]
    },
    {  
      "given":"Y.",
      "family":"Zhang",
      "sequence":"additional",
      "affiliation":[  

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      "given":"X.",
      "family":"Zhou",
      "sequence":"additional",
      "affiliation":[  

      ]
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  ],
  "member":"286",
  "published-online":{  
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      [  
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      ]
    ]
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    {  
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    {  
      "key":"2016100301395315000_2016.0.baw125.5",
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      "doi-asserted-by":"publisher"
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    {  
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    {  
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    {  
      "key":"2016100301395315000_2016.0.baw125.8",
      "unstructured":"Lav\u00edn Trueba J.L. Aransay A.M. (2016) The high-throughput sequencing technologies triple-W discussion: why use HTS, what is the optimal HTS method to use, and which data analysis workflow to follow. In: Lav\u00edn Trueba J.L. Aransay A.M. (eds.) Field Guidelines for Genetic Experimental Designs in High-Throughput Sequencing. Springer International Publishing. pp. 1\u201312.",
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    },
    {  
      "key":"2016100301395315000_2016.0.baw125.9",
      "first-page":"433",
      "article-title":"Mitochondrial DNA extraction and sequencing of formalin-fixed archival snake tissue",
      "volume":"19",
      "author":"Friedman",
      "year":"2008",
      "journal-title":"Mitochondrial DNA"
    },
    {  
      "key":"2016100301395315000_2016.0.baw125.10",
      "first-page":"e2202v1",
      "article-title":"Greater than X kb: a quantitative assessment of preservation conditions on genomic DNA quality, and a proposed standard for genome-quality DNA",
      "volume":"4",
      "author":"Mulcahy",
      "year":"2016",
      "journal-title":"PeerJ Preprints"
    },
    {  
      "key":"2016100301395315000_2016.0.baw125.11",
      "DOI":"10.1038\/nature09678",
      "doi-asserted-by":"publisher"
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    {  
      "key":"2016100301395315000_2016.0.baw125.12",
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    {  
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      "first-page":"D15",
      "DOI":"10.1093\/nar\/gkq1150",
      "article-title":"The international nucleotide sequence database collaboration",
      "volume":"3",
      "author":"Cochrane",
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      "journal-title":"Nucleic Acids Res"
    },
    {  
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      "DOI":"10.1098\/rspb.2007.1290",
      "article-title":"Character-based DNA barcoding allows discrimination of genera, species and populations in Odonata",
      "volume":"275",
      "author":"Rach",
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      "journal-title":"Proc. R. Soc. B"
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    {  
      "key":"2016100301395315000_2016.0.baw125.17",
      "DOI":"10.1126\/science.1251385",
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    {  
      "key":"2016100301395315000_2016.0.baw125.19",
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      "article-title":"How to tackle the molecular species inventory for an industrialized natio\u2013n\u2014lessons from the first phase of the German Barcode of Life initiative GBOL (2012\u20132015)",
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      "author":"Geiger",
      "year":"2016",
      "journal-title":"Genome"
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      "unstructured":"Dessauer H.C. Hafner M.S. (1984) Collection of Frozen Tissues: Value,Management, Field and Laboratory Procedures, and Directory of Existing Collections. Association of Systematics Collections: Lawrence."
    },
    {  
      "key":"2016100301395315000_2016.0.baw125.22",
      "unstructured":"Engstrom M.D. Murphy R.W. Haddrath O. (1990) Sampling vertebrate collections for molecular research: practice and policies. In: Metsger D.A. Byers S.C. (eds), Managing the Modern Herbarium. Elton-Wolf, Vancouver. pp. 315\u2013330."
    },
    {  
      "key":"2016100301395315000_2016.0.baw125.23",
      "unstructured":"de Vincente M.C. Andersson M.S. (2006) DNA banks\u2014providing novel options for genebanks. Topical Reviews in Agricultural Biodiversity. International Plant Genetic Resources Institute, Rome."
    },
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      "article-title":"The Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from their Utilization to the Convention on Biological Diversity",
      "volume":"20",
      "author":"Buck",
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      "journal-title":"Reciel"
    },
    {  
      "key":"2016100301395315000_2016.0.baw125.27",
      "unstructured":"Butler C. Lyal C. Seberg O. (2015) GGBN creates access and benefit sharing documentation for members. GGBN Newsletter, March 2015. http:\/\/ggbn.org\/docs\/GGBN_March2015_Newsletter_FINAL.pdf."
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      "article-title":"Can biospecimen science expedite the ex situ conservation of plants in megadiverse countries? A focus on the flora of brazil",
      "volume":"34",
      "author":"Harding",
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      "volume":"10",
      "author":"Kelbert",
      "year":"2015",
      "journal-title":"PLoS One"
    },
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  ],
  "container-title":"Database",
  "original-title":[  

  ],
  "language":"en",
  "link":[  
    {  
      "URL":"http:\/\/academic.oup.com\/database\/article-pdf\/doi\/10.1093\/database\/baw125\/8225125\/baw125.pdf",
      "content-type":"unspecified",
      "content-version":"vor",
      "intended-application":"similarity-checking"
    }
  ],
  "deposited":{  
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      [  
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      ]
    ],
    "date-time":"2017-08-25T02:23:14Z",
    "timestamp":1503627794000
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  "subtitle":[  

  ],
  "short-title":[  

  ],
  "issued":{  
    "date-parts":[  
      [  
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    ]
  },
  "references-count":46,
  "alternative-id":[  
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  "URL":"http:\/\/dx.doi.org\/10.1093\/database\/baw125",
  "relation":{  
    "cites":[  

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  },
  "ISSN":[  
    "1758-0463"
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  "container-title-short":"Database"
}
citation-style-language / schema

Is original-title a string or array? #169
