{ "$schema": "https://json-schema.org/draft/2020-12/schema", "title": "Digital Credential Metadata Type Schema", "description": "An object defining a Digital Credential Metadata Type", "type": "object", "required": [ "name", "description", "schema_uri", "schema_uri#integrity", "data_source", "display", "claims" ], "properties": { "name": { "type": "string", "description": "Human-readable name for the Verifiable Credential Type", "pattern": "^(?!\\s)(?!.*\\s\\s)(?!.*\\s$).+$" }, "description": { "type": "string", "description": "A human-readable description for the Verifiable Credential Type", "pattern": "^(?!\\s)(?!.*\\s\\s)(?!.*\\s$).+$" }, "extends": { "type": "string", "description": "A URL pointing to a Metadata document of another Verifiable Credential Type that this type extends", "format": "uri" }, "extends#integrity": { "type": "string", "description": "A String representing an integrity metadata for ensuring the integrity of the resource referred to by the extends" }, "schema_uri": { "type": "string", "description": "A URL pointing to a JSON Schema document describing the structure of the Verifiable Credential of this Verifiable Credential type", "format": "uri" }, "schema_uri#integrity": { "type": "string", "description": "A String representing an integrity metadata for ensuring the integrity of the resource referred to by the schema_uri" }, "data_source": { "type": "object", "description": "Object containing information about the data origin for this Verifiable Credential type", "required": [ "verification" ], "properties": { "verification": { "type": "object", "required": [ "trust_framework", "authentic_source" ], "properties": { "trust_framework": { "type": "string", "description": "The trust framework used for digital authentication towards Authentic Source system", "enum": [ "pdnd", "none" ] }, "authentic_source": { "$ref": "#/$defs/authentic_source_properties" } }, "additionalProperties": false } }, "additionalProperties": false }, "display": { "description": "Array of objects containing display information for this Verifiable Credential type for each language supported", "type": "array", "minItems": 1, "items": { "type": "object", "description": "An object defining display properties for a certain supported language", "required": [ "name", "lang", "description" ], "properties": { "lang": { "type": "string", "description": "String value that identifies the language of the Verifiable Credential Type represented as a language tag taken from values defined in RFC 5646 Section 2", "enum": [ "it-IT", "en-US" ] }, "name": { "type": "string", "description": "String value that identifies the name of the Verifiable Credential Type", "pattern": "^(?!\\s)(?!.*\\s\\s)(?!.*\\s$).+$" }, "description": { "type": "string", "description": "String value that identifies a description of the Verifiable Credential Type", "pattern": "^(?!\\s)(?!.*\\s\\s)(?!.*\\s$).+$" }, "rendering": { "type": "object", "description": "An object containing information about rendering methods supported by the Verifiable Credential Type; each Verifiable Credential Type MUST supports at least one of this rendering methods: simple and svg_templates (the simple rendering method is intended for use in applications that do not support SVG rendering; the svg_templates rendering method is intended for use in applications that support SVG rendering)", "properties": { "simple": { "$ref": "#/$defs/no_svg_logo_image_display_properties" }, "svg_templates": { "type": "array", "minItems": 1, "items": { "$ref": "#/$defs/svg_logo_image_display_properties" } } }, "anyOf": [ { "required": [ "simple" ] }, { "required": [ "svg_templates" ] } ], "additionalProperties": false } } } }, "claims": { "description": "Array of objects containing information for displaying and validating Verifiable Credential claims of this Verifiable Credential type", "type": "array", "minItems": 1, "items": { "type": "object", "required": [ "path", "display" ], "properties": { "path": { "type": "array", "description": "Array indicating the path of a specific claim within the Verifiable Credential as defined in Appendix C of OpenID4VCI", "minItems": 1, "items": { "type": "string", "pattern": "^[^\\s]+$" } }, "display": { "type": "array", "description": "Array containing display information about the claim indicated in the path; the array contains an object for each language supported by the Verifiable Credential Type", "minItems": 1, "items": { "type": "object", "description": "An object defining display information about the claim indicated in the path for a certain supported language", "required": [ "label", "lang" ], "properties": { "label": { "type": "string", "description": "human-readable label for the claim", "pattern": "^(?!\\s)(?!.*\\s\\s)(?!.*\\s$).+$" }, "lang": { "type": "string", "description": "String value that identifies the language for the label of the claim as a language tag taken from values defined in RFC 5646 Section 2", "enum": [ "it-IT", "en-US" ] }, "description": { "type": "string", "description": "human-readable description for the claim", "pattern": "^(?!\\s)(?!.*\\s\\s)(?!.*\\s$).+$" } }, "additionalProperties": false } }, "sd": { "type": "string", "description": "A string indicating whether the claim is selectively disclosable (if omitted, the default value is allowed)", "enum": [ "always", "allowed", "never" ] }, "svg_id" : { "type": "string", "description": "A string defining the ID of the claim for reference in the SVG template; the ID MUST be unique within the type metadata; It MUST consist of only alphanumeric characters and underscores and MUST NOT start with a digit", "pattern": "^[a-zA-Z_][\\w]*$" } }, "additionalProperties": false } } }, "additionalProperties": false, "$defs": { "authentic_source_properties": { "type": "object", "description": "Information about an Authentic Source", "required": [ "organization_name", "organization_code", "homepage_uri", "contacts" ], "properties": { "organization_name": { "type": "string", "description": "Name of the Authentic Source", "pattern": "^(?!\\s)(?!.*\\s\\s)(?!.*\\s$).+$" }, "organization_code": { "type": "string", "description": "Code identifier of the Verifiable Credential type", "pattern": "^[^\\s]+$" }, "homepage_uri": { "type": "string", "description": "URI pointing to the Authentic Source's homepage", "format": "uri" }, "logo_uri": { "type": "string", "description": "URI pointing to the Authentic Source's logo imaage", "pattern": "^(http|https):\\/\\/(?!(w{1,2}|w{4,})\\.)(www\\.)?[a-zA-Z0-9-]+(\\.[a-zA-Z0-9-]+)+(\\.[a-zA-Z]{2,})(:[0-9]+)?(\\/.*)?\\.svg$" }, "contacts": { "type": "array", "description": "Contact e-mails for info and assistance", "items": { "type": "string", "pattern": "^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$" } } }, "additionalProperties": false }, "no_svg_logo_image_display_properties": { "type": "object", "description": "An object defining information about displaying a logo image in non-SVG format", "required": [ "logo" ], "properties": { "logo": { "type": "object", "description": "Object with information about the logo image to be displayed for the Verifiable Credential Type", "required": [ "uri" ], "properties": { "uri": { "type": "string", "description": "String value that contains a URI where obtaining the logo image", "pattern": "^(http|https):\\/\\/(?!(w{1,2}|w{4,})\\.)(www\\.)?[a-zA-Z0-9-]+(\\.[a-zA-Z0-9-]+)+(\\.[a-zA-Z]{2,})(:[0-9]+)?(\\/.*)?\\.png$" }, "uri#integrity": { "type": "string", "description": "A String representing an integrity metadata for ensuring the integrity of the logo image referred to by the uri" }, "alt_text": { "type": "string", "description": "String value of the alternative text to display instead of the logo image" } }, "additionalProperties": false }, "background_color": { "type": "string", "description": "RGB color value as defined in W3C.CSS-COLOR for the background of the Verifiable Credential Type" }, "text_color": { "type": "string", "description": "RGB color value as defined in W3C.CSS-COLOR for the text of the Verifiable Credential Type" } }, "additionalProperties": false }, "svg_logo_image_display_properties": { "type": "object", "description": "An object defining information about displaying a logo image in SVG format", "required": [ "uri" ], "properties": { "uri": { "type": "string", "description": "String value that contains a URI where obtaining the SVG logo image", "pattern": "^(http|https):\\/\\/(?!(w{1,2}|w{4,})\\.)(www\\.)?[a-zA-Z0-9-]+(\\.[a-zA-Z0-9-]+)+(\\.[a-zA-Z]{2,})(:[0-9]+)?(\\/.*)?\\.svg$" }, "uri#integrity": { "type": "string", "description": "A String representing an integrity metadata for ensuring the integrity of the svg logo image referred to by the uri" }, "alt_text": { "type": "string", "description": "String value of the alternative text to display instead of the svg logo image" }, "properties": { "type": "object", "description": "An object defining display properties about the SVG logo image (The object MUST contain at least one of this properties: orientation, color_scheme, contrast)", "properties": { "orientation": { "type": "string", "description": "The orientation for which the SVG template is optimized", "enum": [ "portrait", "landscape" ] }, "color_scheme": { "type": "string", "description": "The color scheme for which the SVG template is optimized", "enum": [ "light", "dark" ] }, "contrast": { "type": "string", "description": "The contrast for which the SVG template is optimized", "enum": [ "normal", "high" ] } }, "anyOf": [ { "required": [ "orientation" ] }, { "required": [ "color_scheme" ] }, { "required": [ "contrast" ] } ], "additionalProperties": false } }, "additionalProperties": false } } }