What does the Generate ISDOC Invoice XML skill do?

Převeďte běžná fakturační data na platnou českou XML fakturu ISDOC 6.0.1 — jmenný prostor a struktura dokumentu, mapování polí stran/řádků/daní, zpracování IČO a DIČ, pravidla výpočtu částek a vyřešený příklad připravený k validaci proti ISDOC XSD a tuzemské výměně

How do I run the Generate ISDOC Invoice XML skill?

Copy the skill and paste it into your own Claude or ChatGPT, then provide your source data. FinchContext skills run inside your own AI assistant, so your financial data never leaves your control.

Which region does the Generate ISDOC Invoice XML skill cover?

Czech Republic. It targets the local tax authority / e-invoicing format described on this page.

Generate ISDOC Invoice XML

Skill: Convert invoice data into a valid Czech ISDOC XML

Region: Czech Republic (Česká republika) Category: E-Invoicing Does: Takes ordinary invoice data and produces an ISDOC (Invoice) XML document — the Czech national e-invoice format used for domestic B2B/B2G exchange. Schema version: ISDOC 6.0.1

ISDOC is the established Czech format; EN 16931 (PEPPOL/UBL, see the Slovakia skill for the UBL model) is the path for EU ViDA alignment. Validate the output against the official ISDOC 6.0.1 XSD before sending.

Input data required

Input	Used for
Invoice number, UUID, issue date, tax point date	header
Seller DIČ (VAT no.), IČO (company no.), name, address	`AccountingSupplierParty`
Buyer DIČ, IČO, name, address	`AccountingCustomerParty`
Currency	`LocalCurrencyCode` / `ForeignCurrencyCode`
Line items: description, quantity, unit, unit price, VAT rate	`InvoiceLines`
Bank account / IBAN, due date, variable symbol	`PaymentMeans`

Namespace

Prefix	URI
default	`http://isdoc.cz/namespace/2013`

Root element: <Invoice version="6.0.1" xmlns="http://isdoc.cz/namespace/2013">.

Document structure to emit

Invoice (version="6.0.1")
├── DocumentType            (1 = invoice / tax document)
├── ID                      (invoice number)
├── UUID
├── IssueDate
├── TaxPointDate
├── VATApplicable           (true/false)
├── LocalCurrencyCode       (e.g. CZK)
├── AccountingSupplierParty (seller: Party > PartyIdentification, PartyName, PostalAddress, PartyTaxScheme)
├── AccountingCustomerParty (buyer)
├── InvoiceLines            (one InvoiceLine per item)
├── TaxTotal                (TaxSubTotal per rate + TaxAmount)
├── LegalMonetaryTotal      (totals)
└── PaymentMeans            (bank account, due date, VariableSymbol)

Party (seller / buyer)

Element	Notes
`Party > PartyIdentification > ID`	IČO (company registration number)
`Party > PartyName > Name`	legal name
`Party > PostalAddress`	`StreetName`, `BuildingNumber`, `CityName`, `PostalZone`, `Country > IdentificationCode` (`CZ`)
`Party > PartyTaxScheme > CompanyID`	DIČ (VAT number, e.g. `CZ12345678`)

InvoiceLine

Element	Meaning
`ID`	line number
`InvoicedQuantity`	quantity (with `unitCode` attribute)
`LineExtensionAmount`	line net = quantity × unit price
`UnitPrice`	net unit price
`ClassifiedTaxCategory > Percent`	VAT rate (`21`, `12`, `0`)
`ClassifiedTaxCategory > VATCalculationMethod`	`0` (from below) typical
`Item > Description`	item description

TaxTotal / TaxSubTotal

Element	Meaning
`TaxSubTotal > TaxableAmount`	net per rate
`TaxSubTotal > TaxAmount`	VAT per rate
`TaxSubTotal > TaxInclusiveAmount`	gross per rate
`TaxSubTotal > Percent`	the rate
`TaxTotal > TaxAmount`	total VAT

LegalMonetaryTotal

Element	Meaning
`TaxExclusiveAmount`	net total
`TaxInclusiveAmount`	gross total
`AlreadyClaimedTaxInclusiveAmount`	prepaid (if any)
`PayableAmount`	amount due

Calculation rules

Line net (LineExtensionAmount) = quantity × net unit price, 2 decimals.
Group lines by VAT rate → TaxSubTotal: TaxableAmount = Σ nets; TaxAmount = taxable × rate; TaxInclusiveAmount = taxable + VAT.
TaxExclusiveAmount = Σ taxable; TaxTotal/TaxAmount = Σ VAT; TaxInclusiveAmount = exclusive + VAT total.
PayableAmount = TaxInclusiveAmount − already-paid.
Czech standard VAT rate is 21%; reduced rate 12%.

Worked example (single 21% line)

<?xml version="1.0" encoding="UTF-8"?>
<Invoice xmlns="http://isdoc.cz/namespace/2013" version="6.0.1">
  <DocumentType>1</DocumentType>
  <ID>2024-001</ID>
  <UUID>3aa4d4f0-0b6a-4f1f-9b2d-2f1a9c0e1234</UUID>
  <IssueDate>2024-01-15</IssueDate>
  <TaxPointDate>2024-01-15</TaxPointDate>
  <VATApplicable>true</VATApplicable>
  <LocalCurrencyCode>CZK</LocalCurrencyCode>
  <AccountingSupplierParty>
    <Party>
      <PartyIdentification><ID>12345678</ID></PartyIdentification>
      <PartyName><Name>Acme s.r.o.</Name></PartyName>
      <PostalAddress>
        <StreetName>Programátorská</StreetName><BuildingNumber>42</BuildingNumber>
        <CityName>Praha</CityName><PostalZone>11000</PostalZone>
        <Country><IdentificationCode>CZ</IdentificationCode></Country>
      </PostalAddress>
      <PartyTaxScheme><CompanyID>CZ12345678</CompanyID></PartyTaxScheme>
    </Party>
  </AccountingSupplierParty>
  <AccountingCustomerParty>
    <Party>
      <PartyIdentification><ID>87654321</ID></PartyIdentification>
      <PartyName><Name>Klient a.s.</Name></PartyName>
      <PostalAddress>
        <StreetName>Obchodní</StreetName><BuildingNumber>7</BuildingNumber>
        <CityName>Brno</CityName><PostalZone>60200</PostalZone>
        <Country><IdentificationCode>CZ</IdentificationCode></Country>
      </PostalAddress>
      <PartyTaxScheme><CompanyID>CZ87654321</CompanyID></PartyTaxScheme>
    </Party>
  </AccountingCustomerParty>
  <InvoiceLines>
    <InvoiceLine>
      <ID>1</ID>
      <InvoicedQuantity unitCode="HUR">40</InvoicedQuantity>
      <LineExtensionAmount>10000.00</LineExtensionAmount>
      <UnitPrice>250.00</UnitPrice>
      <ClassifiedTaxCategory><Percent>21</Percent><VATCalculationMethod>0</VATCalculationMethod></ClassifiedTaxCategory>
      <Item><Description>Programátorské služby</Description></Item>
    </InvoiceLine>
  </InvoiceLines>
  <TaxTotal>
    <TaxSubTotal>
      <TaxableAmount>10000.00</TaxableAmount>
      <TaxAmount>2100.00</TaxAmount>
      <TaxInclusiveAmount>12100.00</TaxInclusiveAmount>
      <Percent>21</Percent>
    </TaxSubTotal>
    <TaxAmount>2100.00</TaxAmount>
  </TaxTotal>
  <LegalMonetaryTotal>
    <TaxExclusiveAmount>10000.00</TaxExclusiveAmount>
    <TaxInclusiveAmount>12100.00</TaxInclusiveAmount>
    <AlreadyClaimedTaxInclusiveAmount>0</AlreadyClaimedTaxInclusiveAmount>
    <PayableAmount>12100.00</PayableAmount>
  </LegalMonetaryTotal>
  <PaymentMeans>
    <Payment>
      <PaidAmount>12100.00</PaidAmount>
      <PaymentMeansCode>42</PaymentMeansCode>
      <Details><PaymentDueDate>2024-01-29</PaymentDueDate><ID>123456789/0100</ID><VariableSymbol>2024001</VariableSymbol></Details>
    </Payment>
  </PaymentMeans>
</Invoice>

Validation checklist

Root version="6.0.1" and ISDOC namespace set
UUID is a valid unique identifier; ID (invoice number) unique
Both parties have IČO, name, address, and DIČ where VAT-registered
Each InvoiceLine has quantity (unitCode), unit price, computed LineExtensionAmount, and VAT Percent
TaxSubTotal per rate reconciles with line nets; TaxTotal/TaxAmount = Σ subtotals
LegalMonetaryTotal exclusive + VAT = inclusive; PayableAmount correct
PaymentMeans includes bank account, due date, variable symbol
Validated against the official ISDOC 6.0.1 XSD before sending

Last updated: 2026-05-26 — verify element names, the ISDOC version, and tax-category codes against the official ISDOC 6.0.1 schema and documentation before use.