我正在帮助xsd的新手。我正在尝试创建一个Assert语句，但到目前为止，我仍然收到错误消息： s4s-elt-invalid-content.1：“＃AnonType_CUSTOMERCUSTOMERS”的内容无效。元素“断言”无效，放错位置或发生的次数过多。
为粘贴这么长的xsd文件而道歉，但我想包括所有内容，以便在需要时可以使用整个结构。断言就在尽头。
编辑：仍在寻求帮助。这似乎是一个基本的语法问题，但是我检查了许多示例，看不到哪里出了问题。
<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" version="0.7">
<xs:simpleType name="nvarlong">
<xs:restriction base="xs:string">
<xs:maxLength value="255" />
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="nvar10">
<xs:restriction base="xs:string">
<xs:maxLength value="10" />
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="nvar16">
<xs:restriction base="xs:string">
<xs:maxLength value="16" />
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="taxtype">
<xs:restriction base="xs:string">
<xs:enumeration value = "ssn"/>
<xs:enumeration value = "ein"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="NAICS">
<xs:restriction base='xs:string'>
<xs:pattern value='[0-9]{4,6}'/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="zipcode">
<xs:restriction base="xs:string">
<xs:maxLength value="10" />
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="taxid">
<xs:restriction base="xs:string">
<xs:pattern value="[0-9]{3}-[0-9]{2}-[0-9]{4}|[0-9]{2}-[0-9]{7}"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="farmbill">
<xs:restriction base="xs:string">
<xs:enumeration value = ""/>
<xs:enumeration value = "2014"/>
<xs:enumeration value = "2018"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="switch">
<xs:restriction base="xs:string">
<xs:enumeration value = "y"/>
<xs:enumeration value = "n"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="prohibitedtypes">
<xs:restriction base="xs:string">
<xs:enumeration value = "n"/>
<xs:enumeration value = "p"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="ACHTCAType">
<xs:restriction base="xs:string">
<xs:enumeration value = "PCA"/>
<xs:enumeration value = "FLCA"/>
</xs:restriction>
</xs:simpleType>
<xs:element name="CUSTOMERS">
<xs:complexType>
<xs:sequence>
<xs:element name="CUSTOMER" maxOccurs="unbounded">
<xs:complexType>
<xs:all>
<xs:element name="UniqueCustomerID" type="nvarlong" />
<xs:element name="EntityLegalName" type="nvarlong" />
<xs:element name="DBAName" type="nvarlong" />
<xs:element name="TaxId" type="taxid" />
<xs:element name="TaxIdType" type="taxtype" />
<xs:element name="AddressLine1" type="nvarlong" />
<xs:element minOccurs ="0" name="AddressLine2" type="nvarlong" />
<xs:element minOccurs ="0" name="AddressLine3" type="nvarlong" />
<xs:element minOccurs ="0" name="AddressLine4" type="nvarlong" />
<xs:element name="City" type="nvarlong" />
<xs:element name="Zip" type="zipcode" />
<xs:element name="EffectiveDate" type="xs:date" />
<xs:element name="IsActive" type="switch" />
<xs:element name="NAICSCode" type="NAICS" />
<xs:element name="ProhibitedIndustry" type="prohibitedtypes" />
<xs:element name="Description" type="nvarlong" />
<xs:element name="SWBorderOperations" type="switch" />
<xs:element minOccurs ="0" name="SWBorderOpsDescription" type="nvarlong" />
<xs:element name="HempIndustryParticipant" type="switch"/>
<xs:element minOccurs ="0" name="HempIndustryFarmBill" type="farmbill"/>
<xs:element minOccurs ="0" name="HempIndustryLicenseNumber" type="nvarlong"/>
<xs:element minOccurs ="0" name="HempIndustryLicenseState" type="nvarlong"/>
<xs:element minOccurs ="0" name="HempIndustryLicenseExpiration" type="nvarlong"/>
<xs:element name="KeyIndividualFirstName" type="nvarlong" />
<xs:element minOccurs ="0" name="KeyIndividualMiddleName" type="nvarlong" />
<xs:element name="KeyIndividualLastName" type="nvarlong" />
<xs:element name="KeyIndividualTitle" type="nvarlong" />
<xs:element name="KeyIndividualDOB" type="xs:date" />
<xs:element name="KeyIndividualAddressLine1" type="nvarlong" />
<xs:element minOccurs ="0" name="KeyIndividualAddressLine2" type="nvarlong" />
<xs:element minOccurs ="0" name="KeyIndividualAddressLine3" type="nvarlong" />
<xs:element minOccurs ="0" name="KeyIndividualAddressLine4" type="nvarlong" />
<xs:element name="KeyIndividualCity" type="nvarlong" />
<xs:element name="KeyIndividualZip" type="zipcode" />
<xs:element name="KeyIndividualEmployeeAttestingFirstName" type="nvarlong" />
<xs:element name="KeyIndividualEmployeeAttestingLastName" type="nvarlong" />
<xs:element name="SERVICES">
<xs:complexType>
<xs:all>
<xs:element name="IncomingDomesticACH" type="switch" />
<xs:element name="OutgoingDomesticACH" type="switch" />
<xs:element name="IncomingDomesticWire" type="switch" />
<xs:element name="OutgoingDomesticWire" type="switch" />
<xs:element name="RemoteCheckCapture" type="switch" />
<xs:element name="MobileRemoteCheckCapture" type="switch" />
</xs:all>
</xs:complexType>
</xs:element>
<xs:element name="EmployeeAttestingOwnershipFirstName" type="nvarlong" />
<xs:element name="EmployeeAttestingOwnershipLastName" type="nvarlong" />
<xs:element name="OWNERSHIPDETAILS">
<xs:complexType>
<xs:sequence>
<xs:element maxOccurs="4" name="OWNER">
<xs:complexType>
<xs:all>
<xs:element name="OwnerLegalName" type="nvarlong" />
<xs:element name="PercentOwned" type="xs:decimal" />
<xs:element name="ForeignOwner" type="switch" />
</xs:all>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="ACCOUNTS">
<xs:complexType>
<xs:sequence>
<xs:element name="ACCOUNT" maxOccurs="unbounded">
<xs:complexType>
<xs:all>
<xs:element name="AccountNumber" type="nvarlong" />
<xs:element name="AccountPurpose" type="nvarlong" />
<xs:element name="AccountActive" type="switch" />
</xs:all>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="ACHDETAILS">
<xs:complexType>
<xs:sequence>
<xs:element name="ACHDETAIL" maxOccurs="unbounded">
<xs:complexType>
<xs:all>
<xs:element name="ACHID" type="nvar10" />
<xs:element name="ACHCompanyName" type="nvar16" />
<xs:element name="ACHType" type="ACHTCAType" />
</xs:all>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:all>
<xs:assert test="(SWBorderOperations='y' and string-length(SWBorderOpsDescription)>0) or SWBorderOperations='n' "/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>