import with namespace
File: Data.xml <?xml version="1.0"?> <Unit xmlns="http://www.java2s.com/unit" xmlns:xlink="http://www.w3.org/1999/xlink/namespace" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation= "http://www.java2s.com/unit Schema.xsd"> <myData>...</myData> <Mission xlink:href="https://www.java2s.com"/> </Unit> File: Schema.xsd <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.java2s.com/unit" xmlns="http://www.java2s.com/unit" xmlns:xlink="http://www.w3.org/1999/xlink/namespace" elementFormDefault="qualified"> <xsd:import namespace="http://www.w3.org/1999/xlink/namespace" schemaLocation="xlink.xsd"/> <xsd:element name="Unit"> <xsd:complexType> <xsd:sequence> <xsd:element name="myData" type="xsd:string"/> <xsd:element name="Mission"> <xsd:complexType> <xsd:sequence/> <xsd:attribute ref="xlink:href" use="required"/> </xsd:complexType> </xsd:element> </xsd:sequence> </xsd:complexType> </xsd:element> </xsd:schema> File: xlink.xsd <?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.w3.org/1999/xlink/namespace" xmlns="http://www.w3.org/1999/xlink/namespace" elementFormDefault="qualified"> <xsd:attribute name="href" type="xsd:anyURI"/> </xsd:schema>