data model, allowing the portlet to store view information in the render parameters, session related information in the portlet session and per user persistent data in the portlet preferences a packaging format in order to group different portlets and other Java EE artifacts needed by these portlets into one portlet application which can be deployed on the portal server. Portal development as a way to integrate the different web-based applications for supporting deliveries of information and services. Portlet Catalog Initially Java portal vendors had their own portlet development framework thus those portlets were confined to specific portal servers and couldn't be deployed to the rest of the Java portals. After JSR 168 inception, Java portlets may be deployed on any Java portal servers adhering to JSR 168 specifications. A Portlets Catalog is a set of portlets that are ready-to-use components for enterprise portals. For those who want to adopt portals certainly need many and variety of portlets to deploy and run. Here Portlets catalog are of use. A JSR 168 portlets catalog makes sure that portlets under this catalog may run on any standards–compliant Java portal server. Types of portlet solution (vertical domains and technology) like collaboration, social networking, community, content management, utility, calendaring, HRM all are available in these catalogs. There are many open source and commercial Portlets Catalog available but JSR 168 based solutions are rare. JSR 168 specifications offer suitability to the developers to reuse the code to maintain a set of JSR 168 compliant portlets. For deployers, it's easy to keep a single set of solution and deploy it on many. JSR 286 JSR-286 is the Java Portlet specification v2.0 as developed under the JCP and created in alignment with the updated version 2.0 of WSRP. It was released in June 2008. It was developed to improve on the short-comings of the version 1.0 specification, JSR-168. Some of its major features include: Inter-Portlet Communication through events and public render parameters Serving dynamically generated resources directly through portlets Serving AJAX or JSON data directly through portlets Introduction of portlet filters and listeners JSR 362 JSR-362 is the Java Portlet specification v3.0 and was released in April 2017. Some of its major features include: Resource Dependencies Explicit Render State CDI 1.2 Integration Servlet 3.1 Alignment Portlet Hub & XHR IPC FacesBridge Integration via JSR 378 See also List of enterprise portal vendors Web Services for Remote Portlets (WSRP)