Document

The myDATA document-type code (`invoiceType`); it decides which AADE rules apply and how the XML is composed. Codes outside 1.1-11.5 (for example 13.x, 14.x, 15.x, 16.x, 17.x) exist in the schema but are rejected as "Unknown document type".

• up to 50 characters

{
  "provider_details": {
    "document_type": "1.1"
  }
}

The myDATA payment-method code covering the whole amount (the older form). Used only when you do not send `provider_details.payment_methods`; the provider sends one `paymentMethodDetails` with `type` and `amount` equal to `totals.payable_amount`.

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "payment_method_type": 3
  }
}

List of payment means, as free-form objects; each entry must carry `type` (1-8) and `amount` with 2 decimal places. When the list is not empty the provider sends one `paymentMethodDetails` per entry and ignores `payment_method_type`.

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "payment_methods": [
      {
        "type": 3,
        "amount": "20.00"
      },
      {
        "type": 7,
        "amount": "104.00"
      }
    ]
  }
}

Vehicle registration number. Set it here only for provider `oxygen`; for transmission to myDATA the number is read from `dispatch.vehicle_number`.

• up to 15 characters
• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "vehicle_number": "IKA-7358"
  }
}

Fuel invoice flag. When `true`, the provider writes `fuelInvoice` in the `invoiceHeader` and enables `fuelCode` on the lines and `supplyAccountNumber` on the counterpart.

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "fuel_invoice": true
  }
}

Special document category code (myDATA `specialInvoiceCategory`, Appendix 8.19), written into the `invoiceHeader` only when a value is given. The available list is limited to codes 1-7 and 10-12 (8, 9 and 13 are not submitted through an ERP).

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "special_invoice_category": "1"
  }
}

Invoice variation flag. The field exists in the schema but no provider reads it: no `invoiceVariationType` is emitted in the XML and no value is sent ("We do not support invoice variation types yet").

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "invoice_variation_type": null
  }
}

List of additional correlated entities (myDATA `otherCorrelatedEntities`, Appendix 8.20) with `type` (1-6) and `entity_data` (ΑΦΜ, country, branch, name). The provider sends one `otherCorrelatedEntities` per entry in the `invoiceHeader`.

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "other_correlated_entities": [
      {
        "type": 1,
        "entity_data": {
          "vat_number": "094259216",
          "country": "GR",
          "branch": 0,
          "name": "Φορολογικός Εκπρόσωπος ΑΕ"
        }
      }
    ]
  }
}

{
  "type": 1
}

{
  "entity_data": {
    "vat_number": "094259216",
    "country": "GR",
    "branch": 0,
    "name": "Φορολογικός Εκπρόσωπος ΑΕ"
  }
}

{
  "vat_number": "094259216"
}

{
  "country": "GR"
}

{
  "branch": 0
}

{
  "name": "Φορολογικός Εκπρόσωπος ΑΕ"
}

Delivery-note addresses (myDATA `otherDeliveryNoteHeader`): it holds `loading_address`, `delivery_address`, `start_shipping_branch` and `complete_shipping_branch`. On 9.x/10.x the data is always read from here.

• accepts null

{
  "provider_details": {
    "document_type": "9.3",
    "other_delivery_note_header": {
      "loading_address": {
        "street": "Πανεπιστημίου",
        "number": "123",
        "city": "Αθήνα",
        "postal_code": "10678"
      },
      "delivery_address": {
        "street": "Stadiou",
        "number": "10",
        "city": "Athens",
        "postal_code": "10562"
      }
    }
  }
}

{
  "loading_address": {
    "street": "Πανεπιστημίου",
    "number": "123",
    "city": "Αθήνα",
    "postal_code": "10678"
  }
}

{
  "street": "Πανεπιστημίου"
}

{
  "number": "123"
}

{
  "city": "Αθήνα"
}

{
  "postal_code": "10678"
}

{
  "zip": "10678"
}

{
  "address_line": "Πανεπιστημίου 123"
}

{
  "delivery_address": {
    "street": "Stadiou",
    "number": "10",
    "city": "Athens",
    "postal_code": "10562"
  }
}

{
  "street": "Πανεπιστημίου"
}

{
  "number": "123"
}

{
  "city": "Αθήνα"
}

{
  "postal_code": "10678"
}

{
  "zip": "10678"
}

{
  "address_line": "Πανεπιστημίου 123"
}

{
  "start_shipping_branch": 0
}

{
  "complete_shipping_branch": 1
}

Reverse delivery note. When `true`, the provider writes `reverseDeliveryNote` in the `invoiceHeader` and `is_reverse_delivery_note=true` in the Oxygen header.

• accepts null

{
  "provider_details": {
    "document_type": "9.3",
    "move_purpose": "1",
    "reverse_delivery_note": true,
    "reverse_delivery_note_purpose": 2
  }
}

The reason for issuing a reverse delivery note (myDATA `reverseDeliveryNotePurpose`, Appendix 8.21). It is emitted only when `reverse_delivery_note=true` accompanies it.

• minimum 1
• maximum 5
• accepts null

{
  "reverse_delivery_note_purpose": 2
}

Movement purpose (myDATA `movePurpose`, Appendix 8.18); `dispatch.move_purpose` is also accepted and wins. On 9.3, if the counterpart is the issuer itself and the value is missing or `1`, it is coerced to `8` (internal movement).

• accepts null

{
  "provider_details": {
    "document_type": "9.3",
    "move_purpose": "1"
  }
}

List of Oxygen identifiers or document objects for supplementary invoices (1.6, 2.4, 5.1). It is accepted, but on 1.6/2.4/5.1 provider `oxygen` reads the ΜΑΡΚ numbers from `related_documents` and resolves them to Oxygen ULIDs.

• accepts null

{
  "provider_details": {
    "document_type": "5.1",
    "correlated_documents": [
      "<OXYGEN_ID>"
    ]
  }
}

PEPPOL/Oxygen flags. Provider `oxygen` (types 1.1/2.1/5.1/5.2) reads `provider_details.options.is_peppol` and, when it is `true`, sends `options` with `is_peppol: true`; transmission to myDATA does not touch it.

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "options": {
      "is_peppol": true
    }
  }
}

{
  "options": {
    "is_peppol": true
  }
}

{
  "options": {
    "ignore_classifications": false
  }
}

The buyer's ΑΑΗΤ or ΑΦΜ for PEPPOL (BT-46). Provider `oxygen` (types 5.2/2.1/1.1) writes it to `counterpart.identification`; transmission to myDATA does not touch it.

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "counterpart_identification": "1007.8020000000.0001"
  }
}

B2G contract fields. Provider `oxygen` (types 1.1/2.1/5.1/5.2) reads each field and sends them as `contract`; transmission to myDATA does not touch them.

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "contract": {
      "buyer_reference": "ΣΥΝΗΓΟΡΟΣ ΤΟΥ ΠΟΛΙΤΗ",
      "project_reference": "1|ΩΕΧΜ465ΦΥΟ-5ΜΓ",
      "document_reference": "20SYMV006467658"
    }
  }
}

{
  "buyer_reference": "ΣΥΝΗΓΟΡΟΣ ΤΟΥ ΠΟΛΙΤΗ"
}

{
  "project_reference": "1|ΩΕΧΜ465ΦΥΟ-5ΜΓ"
}

{
  "document_reference": "20SYMV006467658"
}

{
  "contract_id": "FWK-2025-001"
}

{
  "contract_reference": "IT services 2025-2027"
}

B2G shipping fields. Provider `oxygen` (types 1.1/2.1/5.1/5.2) reads `delivery_party_name` and `delivery_address` (`street`, `number`, `city`, `postal_code`) and sends them as `shipping_details`.

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "shipping_details": {
      "delivery_party_name": "ΣΥΝΗΓΟΡΟΣ ΤΟΥ ΠΟΛΙΤΗ",
      "delivery_address": {
        "street": "Λεωφ. Βασιλέως Κωνσταντίνου",
        "number": "3",
        "city": "Κρωπία",
        "postal_code": "19400"
      }
    }
  }
}

{
  "delivery_party_name": "ΣΥΝΗΓΟΡΟΣ ΤΟΥ ΠΟΛΙΤΗ"
}

{
  "delivery_address": {
    "street": "Λεωφ. Βασιλέως Κωνσταντίνου",
    "number": "3",
    "city": "Κρωπία",
    "postal_code": "19400"
  }
}

{
  "street": "Λεωφ. Βασιλέως Κωνσταντίνου"
}

{
  "number": "3"
}

{
  "city": "Κρωπία"
}

{
  "postal_code": "19400"
}

PEPPOL payment terms (BT-20), which provider `oxygen` (types 1.1/2.1/5.1/5.2) sends as `payment_terms`; transmission to myDATA does not touch them. On B2G the Greek name of `payment_method_type` is placed here (for example "Επί Πιστώσει").

• accepts null

{
  "provider_details": {
    "document_type": "1.1",
    "payment_method_type": "5",
    "payment_terms": "Επί πιστώσει"
  }
}

The issuer's registered legal name (ΓΕΜΗ or business registry). It has no maximum length and is transmitted as a text element in the myDATA XML.

{
  "issuer": {
    "legal_name": "Test Company ΕΠΕ"
  }
}

The issuer's VAT number with country prefix (for example `EL123456789` or `GR123456789`); the provider strips the `EL` and `GR` prefixes before transmission and keeps the 9-digit number. With the flexy provider the VAT number must match that of the declared API client.

{
  "issuer": {
    "legal_number": "EL123456789"
  }
}

A description of the issuer's business activity. It is not forwarded to the myDATA XML and provider `oxygen` does not read it; it is simply stored.

{
  "issuer": {
    "legal_activity": "Χονδρικό Εμπόριο"
  }
}

The issuer's address, in the shared address shape. `address_line` (or `street` plus `number`) becomes `street` and `number` in the myDATA XML, while `zip` and `country` become `postalCode` and `country`.

{
  "issuer": {
    "address": {
      "address_line": "Πανεπιστημίου 123",
      "city": "Αθήνα",
      "state": "Αττική",
      "zip": "10678",
      "country": "GR",
      "branch_code": 0
    }
  }
}

{
  "issuer": {
    "address": {
      "address_line": "Πανεπιστημίου 123"
    }
  }
}

{
  "issuer": {
    "address": {
      "street": "Πανεπιστημίου",
      "number": "123"
    }
  }
}

{
  "issuer": {
    "address": {
      "street": "Πανεπιστημίου",
      "number": "123"
    }
  }
}

{
  "issuer": {
    "address": {
      "city": "Αθήνα"
    }
  }
}

{
  "issuer": {
    "address": {
      "state": "Αττική"
    }
  }
}

{
  "issuer": {
    "address": {
      "zip": "10678"
    }
  }
}

{
  "issuer": {
    "address": {
      "country": "GR"
    }
  }
}

{
  "issuer": {
    "address": {
      "branch_code": 0
    }
  }
}

The counterpart's legal name. On types 1.2 and 1.3 (non-Greek) it is always transmitted, on a domestic 1.1 only when the country is not `GR`, and on 3.1 and 3.2 it is explicitly required.

{
  "counterpart": {
    "legal_name": "Customer Company ΑΕ"
  }
}

The counterpart's VAT or tax number, with country prefix (for example `EL123456789`, `DE000000000`). The provider strips the `EL` or `GR` prefix before transmission.

{
  "counterpart": {
    "legal_number": "EL123456789"
  }
}

A description of the counterpart's business activity. It is not forwarded to the myDATA XML and provider `oxygen` does not read it.

{
  "counterpart": {
    "legal_activity": "Λιανικό Εμπόριο"
  }
}

The counterpart's address, in the same shared address shape. It is transmitted as `address` only when you send the object.

{
  "counterpart": {
    "address": {
      "address_line": "Σταδίου 456",
      "city": "Θεσσαλονίκη",
      "state": "Θεσσαλονίκη",
      "zip": "54625",
      "country": "GR",
      "branch_code": 0
    }
  }
}

{
  "counterpart": {
    "address": {
      "address_line": "Σταδίου 456"
    }
  }
}

{
  "counterpart": {
    "address": {
      "street": "Σταδίου",
      "number": "456"
    }
  }
}

{
  "counterpart": {
    "address": {
      "number": "456"
    }
  }
}

{
  "counterpart": {
    "address": {
      "city": "Θεσσαλονίκη"
    }
  }
}

{
  "counterpart": {
    "address": {
      "state": "Θεσσαλονίκη"
    }
  }
}

{
  "counterpart": {
    "address": {
      "zip": "54625"
    }
  }
}

{
  "counterpart": {
    "address": {
      "country": "GR"
    }
  }
}

{
  "counterpart": {
    "address": {
      "branch_code": 0
    }
  }
}

The counterpart's contact email, up to 100 characters. It is not forwarded to myDATA; only provider `oxygen` reads it, for PEPPOL (BT-9/BT-10).

• up to 100 characters
• accepts null

{
  "counterpart": {
    "email": "[email protected]"
  }
}

The counterpart's contact phone, up to 20 characters. It is not forwarded to myDATA; only provider `oxygen` reads it.

• up to 20 characters
• accepts null

{
  "counterpart": {
    "phone": "+302101234567"
  }
}

An ID document number (passport or national ID) for counterparts without a VAT number, up to 20 characters. It is not forwarded to myDATA; only provider `oxygen` reads it.

• up to 20 characters
• accepts null

{
  "counterpart": {
    "document_id_no": "AB123456"
  }
}

The issuing country of the ID document (ISO 3166-1 alpha-2, 2 letters). It is not forwarded to myDATA; only provider `oxygen` reads it.

• up to 2 characters
• accepts null

{
  "counterpart": {
    "document_country_code": "GR"
  }
}

The supplier's internal customer account number in their ERP or accounting system, up to 50 characters. It is not forwarded to myDATA; only provider `oxygen` reads it.

• up to 50 characters
• accepts null

{
  "counterpart": {
    "supply_account_no": "CUST-12345"
  }
}

The buyer's ΑΑΗΤ (electronic invoicing assignment number) or VAT number for B2G. It is not forwarded to myDATA; only provider `oxygen` reads it (PEPPOL BT-46, GR-R-010 with SchemeID 9933).

• up to 255 characters
• accepts null

{
  "counterpart": {
    "identification": "0001.123456789.0001"
  }
}

The dispatch date (`YYYY-MM-DD`). It is stored with the document but not sent to myDATA; only provider `oxygen` uses it.

{
  "dispatch": {
    "dispatch_date": "2025-12-29"
  }
}

The dispatch time (`HH:MM:SS`, 24-hour); the format is not checked. It is stored with the document but not sent to myDATA; only provider `oxygen` uses it.

{
  "dispatch": {
    "dispatch_time": "10:00:00"
  }
}

The vehicle registration number. It is stored with the document but not sent to myDATA; only provider `oxygen` reads it.

{
  "dispatch": {
    "vehicle_number": "ΑΒΓ-1234"
  }
}

AADE movement-purpose code (1-19). On 9.x/10.x delivery notes it is required through `provider_details.move_purpose`, and it is transmitted as `movePurpose` (on 1.1/2.1 used as a delivery note) or inside the header (on 9.x/10.x).

{
  "dispatch": {
    "move_purpose": 1
  }
}

A free-form movement-purpose title, transmitted as `otherMovePurposeTitle` (up to 150 characters) only when `move_purpose=19`.

{
  "dispatch": {
    "move_purpose": 19,
    "other_move_purpose_title": "Μεταφορά μεταξύ αποθηκών"
  }
}

The delivery destination address for the delivery note. It is transmitted as `deliveryAddress` inside `otherDeliveryNoteHeader`, and it requires `loading_address` as well.

{
  "dispatch": {
    "shipping_address": {
      "address_line": "Σταδίου 456",
      "city": "Θεσσαλονίκη",
      "zip": "54625",
      "country": "GR"
    }
  }
}

{
  "dispatch": {
    "shipping_address": {
      "address_line": "Σταδίου 456"
    }
  }
}

{
  "dispatch": {
    "shipping_address": {
      "street": "Σταδίου",
      "number": "456"
    }
  }
}

{
  "dispatch": {
    "shipping_address": {
      "number": "456"
    }
  }
}

{
  "dispatch": {
    "shipping_address": {
      "city": "Θεσσαλονίκη"
    }
  }
}

{
  "dispatch": {
    "shipping_address": {
      "state": "Θεσσαλονίκη"
    }
  }
}

{
  "dispatch": {
    "shipping_address": {
      "zip": "54625"
    }
  }
}

{
  "dispatch": {
    "shipping_address": {
      "country": "GR"
    }
  }
}

{
  "dispatch": {
    "shipping_address": {
      "branch_code": 0
    }
  }
}

The loading (origin) address for the delivery note. It is transmitted as `loadingAddress` inside `otherDeliveryNoteHeader`, and it requires `shipping_address` as well.

{
  "dispatch": {
    "loading_address": {
      "address_line": "Πανεπιστημίου 123",
      "city": "Αθήνα",
      "zip": "10678",
      "country": "GR"
    }
  }
}

{
  "dispatch": {
    "loading_address": {
      "address_line": "Πανεπιστημίου 123"
    }
  }
}

{
  "dispatch": {
    "loading_address": {
      "street": "Πανεπιστημίου",
      "number": "123"
    }
  }
}

{
  "dispatch": {
    "loading_address": {
      "number": "123"
    }
  }
}

{
  "dispatch": {
    "loading_address": {
      "city": "Αθήνα"
    }
  }
}

{
  "dispatch": {
    "loading_address": {
      "state": "Αττική"
    }
  }
}

{
  "dispatch": {
    "loading_address": {
      "zip": "10678"
    }
  }
}

{
  "dispatch": {
    "loading_address": {
      "country": "GR"
    }
  }
}

{
  "dispatch": {
    "loading_address": {
      "branch_code": 0
    }
  }
}

The currency code the exchange rate refers to.

• up to 3 characters

{
  "exchange_rates": {
    "currency_code": "USD",
    "exchange_rate": "1.086400"
  }
}

The exchange rate of the currency against the euro.

• 20 digits in total
• 6 decimal places

{
  "exchange_rates": {
    "currency_code": "USD",
    "exchange_rate": "1.086400"
  }
}

The pickup branch code (PEPPOL BG-14): `0` for the head office, `1` and above for a branch. Used only with `provider=oxygen`.

{
  "shipping_details": {
    "pickup_branch_code": 0
  }
}

The delivery branch code: `0` for the head office, `1` and above for a branch. Used only with `provider=oxygen`.

{
  "shipping_details": {
    "delivery_branch_code": 0
  }
}

The pickup address (PEPPOL BG-14), in the shared address shape. Used only with `provider=oxygen`, and not on types 10.x.

{
  "shipping_details": {
    "pickup_address": {
      "address_line": "Πανεπιστημίου 123",
      "city": "Αθήνα",
      "zip": "10678",
      "country": "GR",
      "branch_code": 0
    }
  }
}

{
  "shipping_details": {
    "pickup_address": {
      "address_line": "Πανεπιστημίου 123"
    }
  }
}

{
  "shipping_details": {
    "pickup_address": {
      "street": "Πανεπιστημίου",
      "number": "123"
    }
  }
}

{
  "shipping_details": {
    "pickup_address": {
      "number": "123"
    }
  }
}

{
  "shipping_details": {
    "pickup_address": {
      "city": "Αθήνα"
    }
  }
}

{
  "shipping_details": {
    "pickup_address": {
      "state": "Αττική"
    }
  }
}

{
  "shipping_details": {
    "pickup_address": {
      "zip": "10678"
    }
  }
}

{
  "shipping_details": {
    "pickup_address": {
      "country": "GR"
    }
  }
}

{
  "shipping_details": {
    "pickup_address": {
      "branch_code": 0
    }
  }
}

The delivery address (PEPPOL BG-15), in the shared address shape. Used only with `provider=oxygen`, and not on types 10.x.

{
  "shipping_details": {
    "delivery_address": {
      "address_line": "Hospital Wing B",
      "city": "Athens",
      "zip": "11527",
      "country": "GR",
      "branch_code": 0
    }
  }
}

{
  "shipping_details": {
    "delivery_address": {
      "address_line": "Hospital Wing B"
    }
  }
}

{
  "shipping_details": {
    "delivery_address": {
      "street": "Hospital Wing B",
      "number": "5"
    }
  }
}

{
  "shipping_details": {
    "delivery_address": {
      "number": "5"
    }
  }
}

{
  "shipping_details": {
    "delivery_address": {
      "city": "Athens"
    }
  }
}

{
  "shipping_details": {
    "delivery_address": {
      "state": "Attica"
    }
  }
}

{
  "shipping_details": {
    "delivery_address": {
      "zip": "11527"
    }
  }
}

{
  "shipping_details": {
    "delivery_address": {
      "country": "GR"
    }
  }
}

{
  "shipping_details": {
    "delivery_address": {
      "branch_code": 0
    }
  }
}

The name of the delivery recipient (PEPPOL `DeliverToPartyName`). Useful in B2G for deliveries to departments or facilities of a larger organisation, and used only with `provider=oxygen`.

{
  "shipping_details": {
    "delivery_party_name": "Athens General Hospital - Cardiology Dept"
  }
}

The delivery location identifier (PEPPOL `DeliverToLocationIdentifier`). Usually a 13-digit GLN or an internal identifier (for example `HOSP-ATH-001`), and used only with `provider=oxygen`.

{
  "shipping_details": {
    "delivery_location_id": "5790000435685"
  }
}

The scheme of the delivery location identifier (PEPPOL): `0088` for GLN, `0177` for ODETTE, or a code of your own. Used only with `provider=oxygen`.

{
  "shipping_details": {
    "delivery_location_id": "5790000435685",
    "delivery_location_scheme_id": "0088"
  }
}

myDATA line kind (`recType`): declared as a 1-7 character string, but myDATA accepts only the integer values 1-7. The provider does not read this field; for special lines (a fee line with VAT or an other-taxes line, for instance) use `items[].taxes[]` with the right `tax_type`.

• up to 7 characters
• at least 1 characters
• accepts null

Internal product or service code (SKU), transmitted as `itemCode`. myDATA accepts it only on delivery notes (9.x, 10.x); on regular invoices it is rejected with "itemCode is forbidden".

• up to 50 characters
• accepts null

{
  "items": [
    {
      "title": "Product A",
      "description": "Delivered product A",
      "item_code": "PROD-001",
      "quantity": "10.00",
      "unit_measure": "ΤΕΜ",
      "unit_value": "0.00",
      "unit_total": "0.00"
    }
  ]
}

A short name for the product or service. It appears on the printed document and becomes the myDATA `itemDescr` when `description` is missing; otherwise `description` is used.

{
  "items": [
    {
      "title": "Premium Widget",
      "description": "High-quality widget product"
    }
  ]
}

A detailed description of the product or service, used as `itemDescr` in myDATA when supplied (preferred over `title`). The 300-character limit comes from Oxygen; myDATA accepts more.

• up to 300 characters

{
  "items": [
    {
      "title": "Premium Widget",
      "description": "High-quality widget product"
    }
  ]
}

Line detail type (myDATA `invoiceDetailType`), with `1` for goods and `2` for services. It is NOT used today: on type 1.5 use `provider_details.detail_type`, while on 9.x/10.x the provider always sends `1`.

• accepts null

The line quantity. myDATA does not restrict the decimals and passes it through as is, while Oxygen accepts up to 4 decimal places.

• 15 digits in total
• 4 decimal places

{
  "items": [
    {
      "quantity": "1.00",
      "unit_measure": "ΤΕΜ",
      "unit_value": "100.00"
    }
  ]
}

The unit of measure. It accepts either the myDATA integer code (for example `1` for pieces) or the Greek or English symbol (for example `ΤΕΜ`, `KG`, `LT`), and the provider normalises it to a code from 1 to 7.

{
  "items": [
    {
      "quantity": "50.00",
      "unit_measure": "LT",
      "unit_value": "1.80"
    }
  ]
}

Unit price before discount and VAT. AADE has no separate unit-price field (only `quantity` and `netValue` in `InvoiceRowType`), so the provider computes `netValue` = `quantity` × `unit_value`, or uses `unit_total` when you supply it.

• 15 digits in total
• 4 decimal places

{
  "items": [
    {
      "unit_value": "100.00",
      "quantity": "1.00",
      "unit_total": "100.00"
    }
  ]
}

A fixed discount per unit, in euros. NOT USED: the provider never reads this field, while Oxygen derives its own discount as (`quantity` × `unit_value`) − `unit_total`.

• 15 digits in total
• 2 decimal places
• accepts null

Discount percentage (for example `10` for 10%). NOT USED: the provider never reads this field; use `unit_value` and `unit_total` to express the discount.

• accepts null

The discount calculation mode (myDATA `discountOption`). NOT USED: the provider never reads it.

• accepts null

myDATA discount type: `1` for a line discount, `2` for a document discount. NOT USED: Oxygen derives it itself and always sets `2` when the gross and net values differ.

• minimum 1
• maximum 2
• accepts null

Per-line tax list; each entry becomes one `taxes` record inside `invoiceDetails` in the myDATA XML, or `lines[].taxes` in the Oxygen JSON. Only per-line taxes are transmitted: document-level taxes (`taxes`) are projected onto each line beforehand.

• accepts null

{
  "items": [
    {
      "title": "Premium Widget",
      "unit_value": "100.00",
      "unit_total": "100.00",
      "taxes": [
        {
          "title": "ΦΠΑ 24%",
          "tax_type": "1",
          "value_type": "percentage",
          "tax_sign": "+",
          "value": "24.00",
          "provider_details": {
            "provider_code": "1"
          }
        },
        {
          "title": "Χαρτόσημο 3.6%",
          "tax_type": "stamp_duty",
          "value_type": "percentage",
          "tax_sign": "+",
          "value": "3.6",
          "provider_details": {
            "provider_code": "3"
          }
        }
      ]
    }
  ]
}