XML Schema文件：Content is not allowed in prolog 的问题！
这个xml的Schema文件到底有什么格式问题？每次载入时都会报：
“Content is not allowed in prolog”
我检查了好几遍，并没有什么全拼的特殊字符啊什么的，格式应该没有问题啊
哪位高人帮忙看看，到底有什么地方不对，抛出的异常就定位到第二行第一列上：
<?xml version= "1.0 " encoding= "UTF-8 "?>
<xsd:schema xmlns:xsd= "http://www.w3.org/2001/XMLSchema " xmlns:tadig-gen= "https://infocentre.gsm.org/TADIG-GEN " xmlns:tadig-raex= "https://infocentre.gsm.org/TADIG-RAEX " targetNamespace= "https://infocentre.gsm.org/TADIG-RAEX " elementFormDefault= "qualified " attributeFormDefault= "unqualified ">
<xsd:import namespace= "https://infocentre.gsm.org/TADIG-GEN " schemaLocation= "tadig-gen-2.0.xsd "/>
<!-- ========================================================================================== -->
<xsd:element name= "TADIGRaexDataSchemaVersion ">
<xsd:simpleType>
<xsd:restriction base= "tadig-gen:genericSchemaVersionType ">
<xsd:enumeration value= "2.0 "/>
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
<!-- ========================================================================================== -->
<xsd:simpleType name= "destinationIdentifierValueType ">
<xsd:restriction base= "xsd:string ">
<xsd:pattern value= "([0-9]{1,15})|(Own|Other Mobile|Fixed|Other) "/>
</xsd:restriction>
</xsd:simpleType>
<!-- ========================================================================================== -->
<xsd:simpleType name= "smsIWReceptionFromOtherSMSCType ">
<xsd:restriction base= "xsd:string ">
<xsd:enumeration value= "Y "/>
<xsd:enumeration value= "N "/>
<xsd:enumeration value= "AA19only "/>
</xsd:restriction>
</xsd:simpleType>
</xsd:schema>
[解决办法]
<xsd:restriction base= "tadig-gen:genericSchemaVersionType ">
tadig-gen:genericSchemaVersionType是无效的类型
