{
"$schema": "http://json-schema.org/draft-04/schema#",
"id": "http://project-open-data.github.io/schema/1_0_final/single_entry.json#",
"title": "Common Core Metadata Schema",
"description": "The metadata format for all federal open data. Validates a single JSON object entry (as opposed to entire Data.json catalog).",
"type": "object",
"required": ["title", "description", "keyword", "modified", "publisher", "contactPoint", "mbox", "identifier", "accessLevel"],
"properties": {
"accessLevel": {
"description":"The degree to which this dataset could be made publicly-available, regardless of whether it has been made available. Choices: public (Data asset is or could be made publicly available to all without restrictions), restricted public (Data asset is available under certain use restrictions), or non-public (Data asset is not available to members of the public)",
"title": "Public Access Level",
"enum": ["public", "restricted public", "non-public"]
},
"accessLevelComment": {
"title":"Access Level Comment",
"description":"An explanation for the selected \"accessLevel\" including instructions for how to access a restricted file, if applicable, or explanation for why a \"non-public\" or \"restricted public\" data assetis not \"public,\" if applicable. Text, 255 characters.",
"anyOf": [
{
"type": "string",
"minLength": 1,
"maxLength":255
},
{
"type": "null"
}
]
},
"accessURL": {
"title":"Download URL",
"description":"URL providing direct access to the downloadable distribution of a dataset.",
"anyOf": [
{
"type": "string",
"format": "uri"
},
{
"type": "null"
}
]
},
"accrualPeriodicity": {
"title":"Frequency",
"description":"Frequency with which dataset is published.",
"anyOf": [
{
"enum": ["Annual", "Bimonthly", "Semiweekly", "Daily", "Biweekly", "Semiannual", "Biennial", "Triennial",
"Three times a week", "Three times a month", "Continuously updated", "Monthly", "Quarterly", "Semimonthly",
"Three times a year", "Weekly", "Completely irregular"]
},
{
"type": "null"
}
]
},
"bureauCode": {
"title":"Bureau Code",
"description":"Federal agencies, combined agency and bureau code from <a href=\"http://www.whitehouse.gov/sites/default/files/omb/assets/a11_current_year/app_c.pdf\">OMB Circular A-11, Appendix C</a> in the format of <code>015:010</code>.",
"anyOf": [
{
"type": "array",
"items": {
"type": "string",
"pattern": "[0-9]{3}:[0-9]{2}"
},
"minItems": 1,
"uniqueItems": true
},
{
"type": "null"
}
]
},
"contactPoint": {
"title":"Contact Name",
"description":"Contact person’s name for the asset.",
"type": "string"
},
"dataDictionary": {
"title":"Data Dictionary",
"description":"URL to the data dictionary for the dataset or API. Note that documentation other than a data dictionary can be referenced using Related Documents as shown in the expanded fields.",
"anyOf": [
{
"type": "string",
"format": "uri"
},
{
"type": "null"
}
]
},
"dataQuality": {
"title":"Data Quality",
"description":"Whether the dataset meets the agency’s Information Quality Guidelines (true/false).",
"anyOf": [
{
"type": "boolean"
},
{
"type": "null"
}
]
},
"description": {
"title" : "Description",
"description": "Human-readable description (e.g., an abstract) with sufficient detail to enable a user to quickly understand whether the asset is of interest.",
"type": "string"
},
"distribution": {
"title":"Distribution",
"description":"Holds multiple download URLs for datasets composed of multiple files and/or file types",
"anyOf": [
{
"type": "array",
"items": {
"type": "object",
"required": ["accessURL", "format"],
"properties": {
"accessURL": {
"title":"Download URL",
"description":"URL providing direct access to the downloadable distribution of a dataset.",
"type": "string",
"format": "uri"
},
"format": {
"title":"Format",
"description":"The file format or API type of the distribution.",
"pattern": "^[-\\w]+/[-\\w]+(\\.[-\\w]+)*([+][-\\w]+)?$",
"type": "string"
}
}
},
"minItems": 1,
"uniqueItems": true
},
{
"type": "null"
}
]
},
"format": {
"title":"Format",
"description":"The file format or API type of the distribution.",
"anyOf": [
{
"pattern": "^[-\\w]+/[-\\w]+(\\.[-\\w]+)*([+][-\\w]+)?$",
"type": "string"
},
{
"type": "null"
}
]
},
"identifier": {
"title":"Unique Identifier",
"description":"A unique identifier for the dataset or API as maintained within an Agency catalog or database.",
"type": "string",
"pattern": "[\\w]+"
},
"issued": {
"title":"Release Date",
"description":"Date of formal issuance.",
"anyOf": [
{
"type": "string",
"pattern": "^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$"
},
{
"type": "string",
"pattern": "^P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?$"
},
{
"type": "string",
"pattern": "^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?(\\/)([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$"
},
{
"type": "string",
"pattern": "^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?(\\/)P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?$"
},
{
"type": "string",
"pattern": "^P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?\\/([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$"
},
{
"type": "string",
"pattern": "^R\\d*\\/([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?\\/P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?$"
},
{
"type": "null"
}
]
},
"keyword": {
"title": "Tags",
"description": "Tags (or keywords) help users discover your dataset; please include terms that would be used by technical and non-technical users.",
"type": "array",
"items": {
"type": "string",
"minLength": 1
},
"minItems": 1
},
"landingPage": {
"title":"Homepage URL",
"description":"Alternative landing page used to redirect user to a contextual, Agency-hosted “homepage” for the Dataset or API when selecting this resource from the Data.gov user interface.",
"anyOf": [
{
"type": "string",
"format": "uri"
},
{
"type": "null"
}
]
},
"language": {
"title":"Language",
"description":"The language of the dataset.",
"anyOf": [
{
"type": "array",
"items": {
"type": "string",
"pattern": "^(((([A-Za-z]{2,3}(-([A-Za-z]{3}(-[A-Za-z]{3}){0,2}))?)|[A-Za-z]{4}|[A-Za-z]{5,8})(-([A-Za-z]{4}))?(-([A-Za-z]{2}|[0-9]{3}))?(-([A-Za-z0-9]{5,8}|[0-9][A-Za-z0-9]{3}))*(-([0-9A-WY-Za-wy-z](-[A-Za-z0-9]{2,8})+))*(-(x(-[A-Za-z0-9]{1,8})+))?)|(x(-[A-Za-z0-9]{1,8})+)|((en-GB-oed|i-ami|i-bnn|i-default|i-enochian|i-hak|i-klingon|i-lux|i-mingo|i-navajo|i-pwn|i-tao|i-tay|i-tsu|sgn-BE-FR|sgn-BE-NL|sgn-CH-DE)|(art-lojban|cel-gaulish|no-bok|no-nyn|zh-guoyu|zh-hakka|zh-min|zh-min-nan|zh-xiang)))$"
}
},
{
"type": "null"
}
]
},
"license": {
"title":"License",
"description":"The license dataset or API is published with. See <a href=\"http://project-open-data.github.io/open-licenses/\">Open Licenses</a> for more information.",
"anyOf": [
{
"type": "string",
"minLength": 1
},
{
"type": "null"
}
]
},
"mbox": {
"title":"Contact Email",
"description":"Contact person’s email address.",
"type": "string",
"format": "email"
},
"modified": {
"title": "Last Update",
"description": "Most recent date on which the dataset was changed, updated or modified.",
"anyOf": [
{
"type": "string",
"pattern": "^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$"
},
{
"type": "string",
"pattern": "^P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?$"
},
{
"type": "string",
"pattern": "^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?(\\/)([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$"
},
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"type": "string",
"pattern": "^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?(\\/)P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?$"
},
{
"type": "string",
"pattern": "^P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?\\/([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$"
},
{
"type": "string",
"pattern": "^R\\d*\\/([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?\\/P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?$"
}
]
},
"PrimaryITInvestmentUII": {
"title":"Primary IT Investment UII",
"description":"For linking a dataset with an IT Unique Investment Identifier (UII)",
"anyOf": [
{
"type": "string",
"pattern": "[0-9]{3}-[0-9]{9}"
},
{
"type": "null"
}
]
},
"programCode": {
"title":"Program Code",
"description":"Federal agencies, list the primary program related to this data asset, from the <a href=\"http://goals.performance.gov/sites/default/files/images/FederalProgramInventory_FY13_MachineReadable_091613.xls\">Federal Program Inventory</a>. Use the format of <code>015:001</code>",
"anyOf": [
{
"type": "array",
"items": {
"type": "string",
"pattern": "[0-9]{3}:[0-9]{3}"
},
"minItems": 1,
"uniqueItems": true
},
{
"type": "null"
}
]
},
"publisher": {
"title":"Publisher",
"description": "The publishing entity.",
"type": "string"
},
"references": {
"title":"Related Documents",
"description":"Related documents such as technical information about a dataset, developer documentation, etc.",
"anyOf": [
{
"type": "array",
"items": {
"type": "string",
"format": "uri"
},
"minItems": 1,
"uniqueItems": true
},
{
"type": "null"
}
]
},
"spatial": {
"title":"Spatial",
"description":"The range of spatial applicability of a dataset. Could include a spatial region like a bounding box or a named place.",
"anyOf": [
{
"type": "string",
"minLength": 1
},
{
"type": "null"
}
]
},
"systemOfRecords": {
"title":"System of Records",
"description":"If the systems is designated as a system of records under the Privacy Act of 1974, provide the URL to the System of Records Notice related to this dataset.",
"anyOf": [
{
"type": "string",
"minLength": 1
},
{
"type": "null"
}
]
},
"temporal": {
"title":"Temporal",
"description":"The range of temporal applicability of a dataset (i.e., a start and end date of applicability for the data).",
"anyOf": [
{
"type": "string",
"pattern": "^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$"
},
{
"type": "string",
"pattern": "^P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?$"
},
{
"type": "string",
"pattern": "^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?(\\/)([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$"
},
{
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},
{
"type": "string",
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},
{
"type": "string",
"pattern": "^R\\d*\\/([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24\\:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?\\/P(?=\\w*\\d)(?:\\d+Y|Y)?(?:\\d+M|M)?(?:\\d+W|W)?(?:\\d+D|D)?(?:T(?:\\d+H|H)?(?:\\d+M|M)?(?:\\d+(?:\\.\\d{1,2})?S|S)?)?$"
},
{
"type": "null"
}
]
},
"theme": {
"title":"Category",
"description":"Main thematic category of the dataset.",
"anyOf": [
{
"type": "array",
"items": {
"type": "string",
"minLength": 1
},
"minItems": 1,
"uniqueItems": true
},
{
"type": "null"
}
]
},
"title": {
"title": "Title",
"description": "Human-readable name of the asset. Should be in plain English and include sufficient detail to facilitate search and discovery.",
"type": "string"
},
"webService": {
"title":"Endpoint",
"description":"Endpoint of web service to access dataset.",
"anyOf": [
{
"type": "string",
"format": "uri"
},
{
"type": "null"
}
]
}
}
}