content: {
    "$defs": {
      "Charge": {
        "description": "Charge represents a surchange applied to the complete document independent from the individual lines.",
        "properties": {
          "amount": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "calculated": true,
            "description": "Amount to apply (calculated if percent present)",
            "title": "Amount"
          },
          "base": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Base represents the value used as a base for percent calculations.\nIf not already provided, we'll take the invoices sum before\ndiscounts.",
            "title": "Base"
          },
          "code": {
            "description": "Code for why was this charge applied?",
            "title": "Reason Code",
            "type": "string"
          },
          "i": {
            "calculated": true,
            "description": "Line number inside the list of charges (calculated).",
            "title": "Index",
            "type": "integer"
          },
          "key": {
            "$ref": "https://gobl.org/draft-0/cbc/key",
            "description": "Key for grouping or identifying charges for tax purposes.",
            "title": "Key"
          },
          "meta": {
            "$ref": "https://gobl.org/draft-0/cbc/meta",
            "description": "Additional semi-structured information.",
            "title": "Meta"
          },
          "percent": {
            "$ref": "https://gobl.org/draft-0/num/percentage",
            "description": "Percentage to apply to the invoice's Sum",
            "title": "Percent"
          },
          "reason": {
            "description": "Text description as to why the charge was applied",
            "title": "Reason",
            "type": "string"
          },
          "ref": {
            "description": "Code to used to refer to the this charge",
            "title": "Reference",
            "type": "string"
          },
          "taxes": {
            "$ref": "https://gobl.org/draft-0/tax/set",
            "description": "List of taxes to apply to the charge",
            "title": "Taxes"
          },
          "uuid": {
            "description": "Universally Unique Identifier.",
            "format": "uuid",
            "title": "UUID",
            "type": "string"
          }
        },
        "required": [
          "i",
          "amount"
        ],
        "type": "object"
      },
      "Delivery": {
        "description": "Delivery covers the details of the destination for the products described in the invoice body.",
        "properties": {
          "date": {
            "$ref": "https://gobl.org/draft-0/cal/date",
            "description": "When the goods should be expected.",
            "title": "Date"
          },
          "identities": {
            "description": "Identities is used to define specific codes or IDs that may be used to\nidentify the delivery.",
            "items": {
              "$ref": "https://gobl.org/draft-0/org/identity"
            },
            "title": "Identities",
            "type": "array"
          },
          "meta": {
            "$ref": "https://gobl.org/draft-0/cbc/meta",
            "description": "Additional custom data.",
            "title": "Meta"
          },
          "period": {
            "$ref": "https://gobl.org/draft-0/cal/period",
            "description": "Period of time in which to expect delivery if a specific date is not available.",
            "title": "Period"
          },
          "receiver": {
            "$ref": "https://gobl.org/draft-0/org/party",
            "description": "The party who will receive delivery of the goods defined in the invoice and is not responsible for taxes.",
            "title": "Receiver"
          }
        },
        "type": "object"
      },
      "Discount": {
        "description": "Discount represents an allowance applied to the complete document independent from the individual lines.",
        "properties": {
          "amount": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "calculated": true,
            "description": "Amount to apply (calculated if percent present).",
            "title": "Amount"
          },
          "base": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Base represents the value used as a base for percent calculations.\nIf not already provided, we'll take the invoices sum.",
            "title": "Base"
          },
          "code": {
            "description": "Code for the reason this discount applied",
            "title": "Reason Code",
            "type": "string"
          },
          "i": {
            "calculated": true,
            "description": "Line number inside the list of discounts (calculated)",
            "title": "Index",
            "type": "integer"
          },
          "meta": {
            "$ref": "https://gobl.org/draft-0/cbc/meta",
            "description": "Additional semi-structured information.",
            "title": "Meta"
          },
          "percent": {
            "$ref": "https://gobl.org/draft-0/num/percentage",
            "description": "Percentage to apply to the invoice's Sum.",
            "title": "Percent"
          },
          "reason": {
            "description": "Text description as to why the discount was applied",
            "title": "Reason",
            "type": "string"
          },
          "ref": {
            "description": "Reference or ID for this Discount",
            "title": "Reference",
            "type": "string"
          },
          "taxes": {
            "$ref": "https://gobl.org/draft-0/tax/set",
            "description": "List of taxes to apply to the discount",
            "title": "Taxes"
          },
          "uuid": {
            "description": "Universally Unique Identifier.",
            "format": "uuid",
            "title": "UUID",
            "type": "string"
          }
        },
        "required": [
          "i",
          "amount"
        ],
        "type": "object"
      },
      "DocumentReference": {
        "description": "DocumentReference provides a link to a existing document.",
        "properties": {
          "code": {
            "description": "Source document's code or other identifier.",
            "title": "Code",
            "type": "string"
          },
          "series": {
            "description": "Series the reference document belongs to.",
            "title": "Series",
            "type": "string"
          },
          "url": {
            "description": "Link to the source document.",
            "format": "uri",
            "title": "URL",
            "type": "string"
          },
          "uuid": {
            "description": "Unique ID copied from the source document.",
            "format": "uuid",
            "title": "UUID",
            "type": "string"
          }
        },
        "type": "object"
      },
      "Invoice": {
        "description": "Invoice represents a payment claim for goods or services supplied under conditions agreed between the supplier and the customer.",
        "properties": {
          "charges": {
            "description": "Charges or surcharges applied to the complete invoice",
            "items": {
              "$ref": "#/$defs/Charge"
            },
            "title": "Charges",
            "type": "array"
          },
          "code": {
            "description": "Sequential code used to identify this invoice in tax declarations.",
            "pattern": "^([A-Za-z0-9][A-Za-z0-9 /\\._-]?)*[A-Za-z0-9]$",
            "title": "Code",
            "type": "string"
          },
          "complements": {
            "description": "Additional complementary objects that add relevant information to the invoice.",
            "items": {
              "$ref": "https://gobl.org/draft-0/schema/object"
            },
            "title": "Complements",
            "type": "array"
          },
          "currency": {
            "$ref": "https://gobl.org/draft-0/currency/code",
            "calculated": true,
            "description": "Currency for all invoice totals.",
            "title": "Currency"
          },
          "customer": {
            "$ref": "https://gobl.org/draft-0/org/party",
            "description": "Legal entity receiving the goods or services, may be empty in certain circumstances such as simplified invoices.",
            "title": "Customer"
          },
          "delivery": {
            "$ref": "#/$defs/Delivery",
            "description": "Specific details on delivery of the goods referenced in the invoice.",
            "title": "Delivery Details"
          },
          "discounts": {
            "description": "Discounts or allowances applied to the complete invoice",
            "items": {
              "$ref": "#/$defs/Discount"
            },
            "title": "Discounts",
            "type": "array"
          },
          "exchange_rates": {
            "description": "Exchange rates to be used when converting the invoices monetary values into other currencies.",
            "items": {
              "$ref": "https://gobl.org/draft-0/currency/exchange-rate"
            },
            "title": "Exchange Rates",
            "type": "array"
          },
          "issue_date": {
            "$ref": "https://gobl.org/draft-0/cal/date",
            "calculated": true,
            "description": "When the invoice was created.",
            "title": "Issue Date"
          },
          "lines": {
            "description": "List of invoice lines representing each of the items sold to the customer.",
            "items": {
              "$ref": "#/$defs/Line"
            },
            "title": "Lines",
            "type": "array"
          },
          "meta": {
            "$ref": "https://gobl.org/draft-0/cbc/meta",
            "description": "Additional semi-structured data that doesn't fit into the body of the invoice.",
            "title": "Meta"
          },
          "notes": {
            "description": "Unstructured information that is relevant to the invoice, such as correction or additional\nlegal details.",
            "items": {
              "$ref": "https://gobl.org/draft-0/cbc/note"
            },
            "title": "Notes",
            "type": "array"
          },
          "op_date": {
            "$ref": "https://gobl.org/draft-0/cal/date",
            "description": "Date when the operation defined by the invoice became effective.",
            "title": "Operation Date"
          },
          "ordering": {
            "$ref": "#/$defs/Ordering",
            "description": "Ordering details including document references and buyer or seller parties.",
            "title": "Ordering Details"
          },
          "outlays": {
            "description": "Expenses paid for by the supplier but invoiced directly to the customer.",
            "items": {
              "$ref": "#/$defs/Outlay"
            },
            "title": "Outlays",
            "type": "array"
          },
          "payment": {
            "$ref": "#/$defs/Payment",
            "description": "Information on when, how, and to whom the invoice should be paid.",
            "title": "Payment Details"
          },
          "preceding": {
            "description": "Key information regarding previous invoices and potentially details as to why they\nwere corrected.",
            "items": {
              "$ref": "#/$defs/Preceding"
            },
            "title": "Preceding Details",
            "type": "array"
          },
          "series": {
            "description": "Used as a prefix to group codes.",
            "pattern": "^([A-Za-z0-9][A-Za-z0-9 /\\._-]?)*[A-Za-z0-9]$",
            "title": "Series",
            "type": "string"
          },
          "supplier": {
            "$ref": "https://gobl.org/draft-0/org/party",
            "description": "The taxable entity supplying the goods or services.",
            "title": "Supplier"
          },
          "tax": {
            "$ref": "#/$defs/Tax",
            "description": "Special tax configuration for billing.",
            "title": "Tax"
          },
          "totals": {
            "$ref": "#/$defs/Totals",
            "calculated": true,
            "description": "Summary of all the invoice totals, including taxes (calculated).",
            "title": "Totals"
          },
          "type": {
            "$ref": "https://gobl.org/draft-0/cbc/key",
            "calculated": true,
            "description": "Type of invoice document subject to the requirements of the local tax regime.",
            "oneOf": [
              {
                "const": "standard",
                "description": "A regular commercial invoice document between a supplier and customer.",
                "title": "Standard"
              },
              {
                "const": "proforma",
                "description": "For a clients validation before sending a final invoice.",
                "title": "Proforma"
              },
              {
                "const": "corrective",
                "description": "Corrected invoice that completely *replaces* the preceding document.",
                "title": "Corrective"
              },
              {
                "const": "credit-note",
                "description": "Reflects a refund either partial or complete of the preceding document. A \ncredit note effectively *extends* the previous document.",
                "title": "Credit Note"
              },
              {
                "const": "debit-note",
                "description": "An additional set of charges to be added to the preceding document.",
                "title": "Debit Note"
              }
            ],
            "title": "Type"
          },
          "uuid": {
            "description": "Universally Unique Identifier.",
            "format": "uuid",
            "title": "UUID",
            "type": "string"
          },
          "value_date": {
            "$ref": "https://gobl.org/draft-0/cal/date",
            "description": "When the taxes of this invoice become accountable, if none set, the issue date is used.",
            "title": "Value Date"
          }
        },
        "required": [
          "type",
          "code",
          "issue_date",
          "currency",
          "supplier",
          "totals"
        ],
        "type": "object"
      },
      "Line": {
        "description": "Line is a single row in an invoice.",
        "properties": {
          "charges": {
            "description": "Charges applied to this line",
            "items": {
              "$ref": "#/$defs/LineCharge"
            },
            "title": "Charges",
            "type": "array"
          },
          "discounts": {
            "description": "Discounts applied to this line",
            "items": {
              "$ref": "#/$defs/LineDiscount"
            },
            "title": "Discounts",
            "type": "array"
          },
          "i": {
            "calculated": true,
            "description": "Line number inside the parent (calculated)",
            "title": "Index",
            "type": "integer"
          },
          "item": {
            "$ref": "https://gobl.org/draft-0/org/item",
            "description": "Details about what is being sold",
            "title": "Item"
          },
          "notes": {
            "description": "Set of specific notes for this line that may be required for\nclarification.",
            "items": {
              "$ref": "https://gobl.org/draft-0/cbc/note"
            },
            "title": "Notes",
            "type": "array"
          },
          "quantity": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Number of items",
            "title": "Quantity"
          },
          "sum": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "calculated": true,
            "description": "Result of quantity multiplied by the item's price (calculated)",
            "title": "Sum"
          },
          "taxes": {
            "$ref": "https://gobl.org/draft-0/tax/set",
            "description": "Map of taxes to be applied and used in the invoice totals",
            "title": "Taxes"
          },
          "total": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "calculated": true,
            "description": "Total line amount after applying discounts to the sum (calculated).",
            "title": "Total"
          },
          "uuid": {
            "description": "Universally Unique Identifier.",
            "format": "uuid",
            "title": "UUID",
            "type": "string"
          }
        },
        "required": [
          "i",
          "quantity",
          "item",
          "sum",
          "total"
        ],
        "type": "object"
      },
      "LineCharge": {
        "description": "LineCharge represents an amount added to the line, and will be applied before taxes.",
        "properties": {
          "amount": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "calculated": true,
            "description": "Fixed or resulting charge amount to apply (calculated if percent present).",
            "title": "Amount"
          },
          "code": {
            "description": "Reference code.",
            "title": "Code",
            "type": "string"
          },
          "percent": {
            "$ref": "https://gobl.org/draft-0/num/percentage",
            "description": "Percentage if fixed amount not applied",
            "title": "Percent"
          },
          "reason": {
            "description": "Text description as to why the charge was applied",
            "title": "Reason",
            "type": "string"
          }
        },
        "required": [
          "amount"
        ],
        "type": "object"
      },
      "LineDiscount": {
        "description": "LineDiscount represents an amount deducted from the line, and will be applied before taxes.",
        "properties": {
          "amount": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "calculated": true,
            "description": "Fixed discount amount to apply (calculated if percent present).",
            "title": "Value"
          },
          "code": {
            "description": "Reason code.",
            "title": "Code",
            "type": "string"
          },
          "percent": {
            "$ref": "https://gobl.org/draft-0/num/percentage",
            "description": "Percentage if fixed amount not applied",
            "title": "Percent"
          },
          "reason": {
            "description": "Text description as to why the discount was applied",
            "title": "Reason",
            "type": "string"
          }
        },
        "required": [
          "amount"
        ],
        "type": "object"
      },
      "Ordering": {
        "description": "Ordering provides additional information about the ordering process including references to other documents and alternative parties involved in the order-to-delivery process.",
        "properties": {
          "buyer": {
            "$ref": "https://gobl.org/draft-0/org/party",
            "description": "Party who is responsible for making the purchase, but is not responsible\nfor handling taxes.",
            "title": "Buyer"
          },
          "code": {
            "description": "Identifier assigned by the customer or buyer for internal routing purposes.",
            "title": "Code",
            "type": "string"
          },
          "contract": {
            "$ref": "#/$defs/DocumentReference",
            "description": "The identification of a contract.",
            "title": "Contract"
          },
          "despatch": {
            "$ref": "#/$defs/DocumentReference",
            "description": "Despatch advice.",
            "title": "Despatch Advice"
          },
          "identities": {
            "description": "Any additional Codes, IDs, SKUs, or other regional or custom\nidentifiers that may be used to identify the order.",
            "items": {
              "$ref": "https://gobl.org/draft-0/org/identity"
            },
            "title": "Identities",
            "type": "array"
          },
          "period": {
            "$ref": "https://gobl.org/draft-0/cal/period",
            "description": "Period of time that the invoice document refers to often used in addition to the details\nprovided in the individual line items.",
            "title": "Period"
          },
          "project": {
            "$ref": "#/$defs/DocumentReference",
            "description": "Project this invoice refers to.",
            "title": "Project"
          },
          "purchase": {
            "$ref": "#/$defs/DocumentReference",
            "description": "Purchase order issued by the customer or buyer.",
            "title": "Purchase Order"
          },
          "receiving": {
            "$ref": "#/$defs/DocumentReference",
            "description": "Receiving Advice.",
            "title": "Receiving Advice"
          },
          "sale": {
            "$ref": "#/$defs/DocumentReference",
            "description": "Sales order issued by the supplier or seller.",
            "title": "Sales Order"
          },
          "seller": {
            "$ref": "https://gobl.org/draft-0/org/party",
            "description": "Party who is selling the goods but is not responsible for taxes like the\nsupplier.",
            "title": "Seller"
          },
          "tender": {
            "$ref": "#/$defs/DocumentReference",
            "description": "Tender advice, the identification of the call for tender or lot the invoice relates to.",
            "title": "Tender Advice"
          }
        },
        "type": "object"
      },
      "Outlay": {
        "description": "Outlay represents a reimbursable expense that was paid for by the supplier and invoiced separately by the third party directly to the customer.",
        "properties": {
          "amount": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Amount paid by the supplier.",
            "title": "Amount"
          },
          "code": {
            "description": "Invoice number or other reference detail used to identify the outlay.",
            "title": "Code",
            "type": "string"
          },
          "date": {
            "$ref": "https://gobl.org/draft-0/cal/date",
            "description": "When was the outlay made.",
            "title": "Date"
          },
          "description": {
            "description": "Details on what the outlay was.",
            "title": "Description",
            "type": "string"
          },
          "i": {
            "calculated": true,
            "description": "Outlay number index inside the invoice for ordering (calculated).",
            "title": "Index",
            "type": "integer"
          },
          "series": {
            "description": "Series of the outlay invoice.",
            "title": "Series",
            "type": "string"
          },
          "supplier": {
            "$ref": "https://gobl.org/draft-0/org/party",
            "description": "Who was the supplier of the outlay",
            "title": "Supplier"
          },
          "uuid": {
            "description": "Universally Unique Identifier.",
            "format": "uuid",
            "title": "UUID",
            "type": "string"
          }
        },
        "required": [
          "i",
          "description",
          "amount"
        ],
        "type": "object"
      },
      "Payment": {
        "description": "Payment contains details as to how the invoice should be paid.",
        "properties": {
          "advances": {
            "description": "Any amounts that have been paid in advance and should be deducted from the amount due.",
            "items": {
              "$ref": "https://gobl.org/draft-0/pay/advance"
            },
            "title": "Advances",
            "type": "array"
          },
          "instructions": {
            "$ref": "https://gobl.org/draft-0/pay/instructions",
            "description": "Details on how payment should be made.",
            "title": "Instructions"
          },
          "payee": {
            "$ref": "https://gobl.org/draft-0/org/party",
            "description": "The party responsible for receiving payment of the invoice, if not the supplier.",
            "title": "Payee"
          },
          "terms": {
            "$ref": "https://gobl.org/draft-0/pay/terms",
            "description": "Payment terms or conditions.",
            "title": "Terms"
          }
        },
        "type": "object"
      },
      "Preceding": {
        "description": "Preceding allows for information to be provided about a previous invoice that this one will replace, subtract from, or add to.",
        "properties": {
          "code": {
            "description": "Code of the previous document.",
            "pattern": "^([A-Za-z0-9][A-Za-z0-9 /\\._-]?)*[A-Za-z0-9]$",
            "title": "Code",
            "type": "string"
          },
          "ext": {
            "$ref": "https://gobl.org/draft-0/tax/extensions",
            "description": "Extensions for region specific requirements.",
            "title": "Ext"
          },
          "issue_date": {
            "$ref": "https://gobl.org/draft-0/cal/date",
            "description": "The issue date of the previous document.",
            "title": "Issue Date"
          },
          "meta": {
            "$ref": "https://gobl.org/draft-0/cbc/meta",
            "description": "Additional semi-structured data that may be useful in specific regions",
            "title": "Meta"
          },
          "period": {
            "$ref": "https://gobl.org/draft-0/cal/period",
            "description": "Tax period in which the previous invoice had an effect required by some tax regimes and formats.",
            "title": "Period"
          },
          "reason": {
            "description": "Human readable description on why the preceding invoice is being replaced.",
            "title": "Reason",
            "type": "string"
          },
          "series": {
            "description": "Series identification code",
            "pattern": "^([A-Za-z0-9][A-Za-z0-9 /\\._-]?)*[A-Za-z0-9]$",
            "title": "Series",
            "type": "string"
          },
          "stamps": {
            "description": "Seals of approval from other organisations that may need to be listed.",
            "items": {
              "$ref": "https://gobl.org/draft-0/head/stamp"
            },
            "title": "Stamps",
            "type": "array"
          },
          "type": {
            "$ref": "https://gobl.org/draft-0/cbc/key",
            "description": "Type of the preceding document",
            "oneOf": [
              {
                "const": "standard",
                "description": "A regular commercial invoice document between a supplier and customer.",
                "title": "Standard"
              },
              {
                "const": "proforma",
                "description": "For a clients validation before sending a final invoice.",
                "title": "Proforma"
              },
              {
                "const": "corrective",
                "description": "Corrected invoice that completely *replaces* the preceding document.",
                "title": "Corrective"
              },
              {
                "const": "credit-note",
                "description": "Reflects a refund either partial or complete of the preceding document. A \ncredit note effectively *extends* the previous document.",
                "title": "Credit Note"
              },
              {
                "const": "debit-note",
                "description": "An additional set of charges to be added to the preceding document.",
                "title": "Debit Note"
              }
            ],
            "title": "Type"
          },
          "uuid": {
            "description": "Preceding document's UUID.",
            "format": "uuid",
            "title": "UUID",
            "type": "string"
          }
        },
        "required": [
          "code"
        ],
        "type": "object"
      },
      "Tax": {
        "description": "Tax defines a summary of the taxes which may be applied to an invoice.",
        "properties": {
          "meta": {
            "$ref": "https://gobl.org/draft-0/cbc/meta",
            "description": "Any additional data that may be required for processing, but should never\nbe relied upon by recipients.",
            "title": "Meta"
          },
          "prices_include": {
            "$ref": "https://gobl.org/draft-0/cbc/code",
            "description": "Category of the tax already included in the line item prices, especially\nuseful for B2C retailers with customers who prefer final prices inclusive of\ntax.",
            "title": "Prices Include"
          },
          "tags": {
            "description": "Special tax tags that apply to this invoice according to local requirements.",
            "items": {
              "$ref": "https://gobl.org/draft-0/cbc/key"
            },
            "title": "Tags",
            "type": "array"
          }
        },
        "type": "object"
      },
      "Totals": {
        "description": "Totals contains the summaries of all calculations for the invoice.",
        "properties": {
          "advance": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Total amount already paid in advance.",
            "title": "Advance"
          },
          "charge": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Sum of all document level charges",
            "title": "Charge"
          },
          "discount": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Sum of all document level discounts",
            "title": "Discount"
          },
          "due": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "How much actually needs to be paid now.",
            "title": "Due"
          },
          "outlays": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Total paid in outlays that need to be reimbursed",
            "title": "Outlay Totals"
          },
          "payable": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Total amount to be paid after applying taxes and outlays.",
            "title": "Payable"
          },
          "rounding": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Rounding amount to apply to the invoice in case the total and payable\namounts don't quite match.",
            "title": "Rounding"
          },
          "sum": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Sum of all line item sums",
            "title": "Sum"
          },
          "tax": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Total amount of tax to apply to the invoice.",
            "title": "Tax"
          },
          "tax_included": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "If prices include tax, this is the total tax included in the price.",
            "title": "Tax Included"
          },
          "taxes": {
            "$ref": "https://gobl.org/draft-0/tax/total",
            "description": "Summary of all the taxes included in the invoice.",
            "title": "Tax Totals"
          },
          "total": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Sum of all line sums minus the discounts, plus the charges, without tax.",
            "title": "Total"
          },
          "total_with_tax": {
            "$ref": "https://gobl.org/draft-0/num/amount",
            "description": "Grand total after all taxes have been applied.",
            "title": "Total with Tax"
          }
        },
        "required": [
          "sum",
          "total",
          "total_with_tax",
          "payable"
        ],
        "type": "object"
      }
    },
    "$id": "https://gobl.org/draft-0/bill/invoice",
    "$ref": "#/$defs/Invoice",
    "$schema": "https://json-schema.org/draft/2020-12/schema"
  }