Hi,
I have used Hibernate in the past,but for the first time I am creating a framework by my own.
I am using Netbeans IDE.I have successfully connected to postgresql and my hibernate mapping file is like this

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Student" table="Student">
<property
name="roll_no"
column="at_rollno">
</property>
<property
name="name"
column="at_name">
</property>
<property
name="address"
column="Address">
</property>
</class>

</hibernate-mapping>


But while validating thsi XML I am getting an error like this
The content of element type "class" must match "(meta*,subselect?,cache?,synchronize*,comment?,tuplizer*,(id|composite-id),discriminator?,natural-id?,(version|timestamp)?,(property|many-to-one|one-to-one|component|dynamic-component|properties|any|map|set|list|bag|idbag|array|primitive-array)*,((join*,subclass*)|joined-subclass*|union-subclass*),loader?,sql-insert?,sql-update?,sql-delete?,filter*,resultset*,(query|sql-query)*)". [17]


Please help.Thanks in advance

hi

its look like your class is not mapping can you paste your code like student.java , your database student table

You need to declare an <id> or <composite-id> in the mapping file.