See this page for more details about the JEE XML Schemas for Java EE Deployment Descriptors:
http://www.oracle.com/webfolder/technetwork/jsc/xml/ns/javaee/index.html

All new schemas are in the http://xmlns.jcp.org/xml/ns/javaee/ namespace.

Most older schemas remain in the http://java.sun.com/xml/ns/javaee/ namespace.

File Name	Description
application_7.xsd	Application schema
application-client_7.xsd	Application Client schema
batchXML_1_0.xsd	Schema for batch.xml-based artifact loading in Java Batch
beans_1_1.xsd	Contexts and Dependency Injection schema
connector_1_7.xsd	Java EE Connector schema
ejb-jar_3_2.xsd	Enterprise JavaBeans Deployment Descriptor Schema
javaee_7.xsd	Java EE 7 definitions file that contains common schema components
javaee_web_services_1_4.xsd	Web services schema
javaee_web_services_client_1_4.xsd	Web services client schema
jobXML_1_0.xsd	Batch Job Specification Language (JSL) schema
jsp_2_3.xsd	JavaServer Pages Deployment Descriptor schema
permissions_7.xsd	Java EE application permissions schema
web-app_3_1.xsd	Web Application Deployment Descriptor schema
web-common_3_1.xsd	Web Application Deployment Descriptor common definitions schema
web-fragment_3_1.xsd	Web Application Deployment Descriptor fragment schema
web-facelettaglibrary_2_2.xsd	JavaServer Faces Facelet Tag Library schema
web-facesconfig_2_2.xsd	JavaServer Faces Application Configuration File schema
web-partialresponse_2_2.xsd	JavaServer Faces partial response schema
web-facesuicomponent_2_0.xsd	JavaServer Faces UI Component Configuration schema
web-jsptaglibrary_2_1.xsd	JSP Taglibrary Deployment Descriptor schema
javaee_web_services_metadata_handler_2_0.xsd	Web services schema
http://www.w3.org/2001/xml.xsd	The Java EE schemas use some common definitions provided and published by W3C

All of these schemas are in the http://java.sun.com/xml/ns/javaee namespace.

File Name	Description
application_6.xsd	Application schema
application-client_6.xsd	Application Client schema
beans_1_0.xsd	Contexts and Dependency Injection schema
connector_1_6.xsd	Java EE Connector schema
ejb-jar_3_1.xsd	Enterprise JavaBeans Deployment Descriptor Schema
javaee_6.xsd	Java EE 6 definitions file that contains common schema components
javaee_web_services_1_3.xsd	Web services schema
javaee_web_services_client_1_3.xsd	Web services client schema
jsp_2_2.xsd	JavaServer Pages Deployment Descriptor schema
web-app_3_0.xsd	Web Application Deployment Descriptor schema
web-common_3_0.xsd	Web Application Deployment Descriptor common definitions schema
web-fragment_3_0.xsd	Web Application Deployment Descriptor fragment schema
web-facelettaglibrary_2_0.xsd	JavaServer Faces Facelet Tag Library schema
web-facesconfig_2_0.xsd	JavaServer Faces Application Configuration File schema
web-facesuicomponent_2_0.xsd	JavaServer Faces UI Component Configuration schema
web-partialresponse_2_0.xsd	JavaServer Faces partial response schema
web-jsptaglibrary_2_1.xsd	JSP Taglibrary Deployment Descriptor schema
javaee_web_services_metadata_handler_2_0.xsd	Web services schema
http://www.w3.org/2001/xml.xsd	The Java EE schemas use some common definitions provided and published by W3C

All of these schemas are in the http://java.sun.com/xml/ns/javaee namespace.

File Name	Description
application_5.xsd	Application schema
application-client_5.xsd	Application Client schema
ejb-jar_3_0.xsd	Enterprise JavaBeans Deployment Descriptor Schema
javaee_5.xsd	Java EE 5 definitions file that contains common schema components
javaee_web_services_1_2.xsd	Web services schema
javaee_web_services_client_1_2.xsd	Web services client schema
jsp_2_1.xsd	JavaServer Pages Deployment Descriptor Schema
web-app_2_5.xsd	Servlet Deployment Descriptor Schema
web-facesconfig_1_2.xsd	JavaServer Faces Application Configuration File schema
web-jsptaglibrary_2_1.xsd	JSP Taglibrary Deployment Descriptor Schema
javaee_web_services_metadata_handler_2_0.xsd	Java EE Web Services Metadata Handler Chain Schema