use lib.xsd and catalog.xsd to validate catalog.xml, didn't work

[loveca2012]

Hi everyone,

I need to validate a file named catalog.xml, I constructed two XML Schema documents: one for a library of user-defined data types, and one for the catalog itself.

I got some error messages when i did the online validation using the tool

http://www.xmlvalidation.com/index.php?id=1&L=0.

I suppose I messed up with namespaces among the three files but couldn't figure out how to fix the problem. I quote parts of the files and error messages here. Any input is welcome. Thanks in advance.

part of the catalog.xml:
<catalog:catalog xmlns:xsi="

http://www.w3.org/2001/XMLSchema-instance"

xmlns:catalog="

http://www.superstarmovies.com/catalog"

xsi:schemaLocation="

http://www.superstarmovies.com/catalog

catalog.xsd">
<movie id="m2001-012" genre="drama">
<title>Monster&apos;s Ball</title>
......
</catalog:catalog>

part of the catalog.xsd:
<xs:schema xmlns:xs="

http://www.w3.org/2001/XMLSchema"

xmlns:lib="

http://www.superstarmovies.com/library"

xmlns="

http://www.superstarmovies.com/catalog"

targetNamespace="

http://www.superstarmovies.com/catalog">

<xs:import namespace="

http://www.superstarmovies/library"

schemaLocation="lib.xsd" />

<xs:element name="catalog">
<xs:complexType>
<xs:all>
......

part of lib.xsd:
<xs:schema xmlns:xs="

http://www.w3.org/2001/XMLSchema"

xmlns="

http://www.superstarmovies.com/library"

targetNamespace="

http://www.superstarmovies.com/library">

<xs:simpleType name="actorID">
.......


error messages:
Errors in the XML document:
16: 89 cvc-elt.1: Cannot find the declaration of element 'catalog:catalog'.
Errors in file xml-schema:
18: 68 TargetNamespace.2: Expecting no namespace, but the schema document has a target namespace of 'http//

http://www.superstarmovies.com/catalog'.

Errors in file catalog.xsd:
16: 68 TargetNamespace.1: Expecting namespace 'http//

http://www.superstarmovies.com/catalog',

but the target namespace of the schema document is 'http//

http://www.superstarmovies.com/library'.