# FX-SCH-A-000019

Source: https://xmlvalid.com/rules/FX-SCH-A-000019

> Element 'ram:ID' must occur exactly 1 times.

- Level: error
- Rule sets: Factur-X MINIMUM rules 1.09, Factur-X BASIC WL rules 1.09, Factur-X BASIC rules 1.09, Factur-X EN 16931 rules 1.09.2, Factur-X EXTENDED rules 1.09.2
- Context: `/rsm:CrossIndustryInvoice/rsm:ExchangedDocument`
- Test: `count(ram:ID)=1`

> Element 'ram:ID' must occur exactly 1 times.

- Level: error
- Rule sets: Factur-X MINIMUM rules 1.09, Factur-X BASIC rules 1.09
- Context: `/rsm:CrossIndustryInvoice/rsm:ExchangedDocumentContext/ram:BusinessProcessSpecifiedDocumentContextParameter`
- Test: `count(ram:ID)=1`

> Element 'ram:ID' must occur exactly 1 times.

- Level: error
- Rule sets: Factur-X MINIMUM rules 1.09, Factur-X BASIC rules 1.09
- Context: `/rsm:CrossIndustryInvoice/rsm:ExchangedDocumentContext/ram:GuidelineSpecifiedDocumentContextParameter`
- Test: `count(ram:ID)=1`

> Element 'ram:ID' must occur exactly 1 times.

- Level: error
- Rule sets: Factur-X MINIMUM rules 1.09
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:BuyerTradeParty/ram:SpecifiedLegalOrganization`
- Test: `count(ram:ID)=1`

> Element 'ram:ID' must occur exactly 1 times.

- Level: error
- Rule sets: Factur-X MINIMUM rules 1.09, Factur-X BASIC rules 1.09
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTradeParty/ram:SpecifiedTaxRegistration[ram:ID/@schemeID="FC"]`
- Test: `count(ram:ID)=1`

> Element 'ram:ID' must occur exactly 1 times.

- Level: error
- Rule sets: Factur-X MINIMUM rules 1.09, Factur-X BASIC rules 1.09
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTradeParty/ram:SpecifiedTaxRegistration[ram:ID/@schemeID="VA"]`
- Test: `count(ram:ID)=1`

> Element 'ram:ID' must occur exactly 1 times.

- Level: error
- Rule sets: Factur-X BASIC rules 1.09
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:BuyerTradeParty/ram:SpecifiedTaxRegistration`
- Test: `count(ram:ID)=1`

> Element 'ram:ID' must occur exactly 1 times.

- Level: error
- Rule sets: Factur-X BASIC rules 1.09
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTaxRepresentativeTradeParty/ram:SpecifiedTaxRegistration`
- Test: `count(ram:ID)=1`

Validate a document against these rules: https://xmlvalid.com/validate