there.I'm trying to validate a xml document with a schema made by myself and I keep getting this error:Validation stopped at line 40, column 12: element 'article' is not allowed for content model '(book*|article*|mastersthesis*|inproceedings*)'My xsd file is well-formed, so as my xml file. The line 40 is just the end of my xml document (\[code\]</bibEntry>\[/code\] ).This is part of my xsd file:\[code\]<xs:element name="bibEntry" type="entryType"/> <xs:complexType name="entryType"> <xs:choice> <xs:element ref="book" minOccurs="0" maxOccurs="unbounded"/> <xs:element ref="article" minOccurs="0" maxOccurs="unbounded"/> <xs:element ref="mastersthesis" minOccurs="0" maxOccurs="unbounded"/> <xs:element ref="inproceedings" minOccurs="0" maxOccurs="unbounded"/> </xs:choice> </xs:complexType><xs:element name="author" type="xs:string"/><xs:element name="title" type="xs:string"/><xs:element name="publisher" type="xs:string"/><xs:element name="year" type="xs:string"/><xs:element name="edition" type="xs:string"/><xs:element name="ISBN" type="xs:string"/><xs:element name="journal" type="xs:string"/><xs:element name="volume" type="xs
ositiveInteger"/><xs:element name="number" type="xsositiveInteger"/><xs:element name="pages" type="xs:string"/><xs:element name="school" type="xs:string"/><xs:element name="booktitle" type="xs:string"/><xs:element name="book" type="bookType"/> <xs:complexType name="bookType"> <xs:sequence> <xs:element ref="author"/> <xs:element ref="title"/> <xs:element ref="publisher"/> <xs:element ref="year"/> <xs:element ref="edition"/> <xs:element ref="ISBN"/> </xs:sequence> <xs:attribute name="id" type="xs:NMTOKEN"/> </xs:complexType> <xs:element name="article" type="articleType"/> <xs:complexType name="articleType" mixed="true"> <xs:sequence> <xs:element ref="author"/> <xs:element ref="title"/> <xs:element ref="year"/> <xs:element ref="journal"/> <xs:element ref="volume"/> <xs:element ref="number"/> <xs:element ref="pages"/> </xs:sequence> <xs:attribute name="id" type="xs:NMTOKEN"/> </xs:complexType>\[/code\]And this is my xml: \[code\]<bibEntry xmlns="http://www.w3schools.com"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.w3schools.com bibEntry.xsd"> <book> <author>Jos
ositiveInteger"/><xs:element name="number" type="xsositiveInteger"/><xs:element name="pages" type="xs:string"/><xs:element name="school" type="xs:string"/><xs:element name="booktitle" type="xs:string"/><xs:element name="book" type="bookType"/> <xs:complexType name="bookType"> <xs:sequence> <xs:element ref="author"/> <xs:element ref="title"/> <xs:element ref="publisher"/> <xs:element ref="year"/> <xs:element ref="edition"/> <xs:element ref="ISBN"/> </xs:sequence> <xs:attribute name="id" type="xs:NMTOKEN"/> </xs:complexType> <xs:element name="article" type="articleType"/> <xs:complexType name="articleType" mixed="true"> <xs:sequence> <xs:element ref="author"/> <xs:element ref="title"/> <xs:element ref="year"/> <xs:element ref="journal"/> <xs:element ref="volume"/> <xs:element ref="number"/> <xs:element ref="pages"/> </xs:sequence> <xs:attribute name="id" type="xs:NMTOKEN"/> </xs:complexType>\[/code\]And this is my xml: \[code\]<bibEntry xmlns="http://www.w3schools.com"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.w3schools.com bibEntry.xsd"> <book> <author>Jos