J2EE

A deployable unit that consists of one or more enterprise beans and an EJB deployment descriptor.

A J2EE component that implements a business task or business entity and is hosted by an EJB container; either an entity bean, a session bean, or a message-driven bean.

A component architecture for the development and deployment of object-oriented, distributed, enterprise-level applications. Applications written using the Enterprise JavaBeans architecture are scalable, transactional, and secure.

XML.

An entity that is referenced as part of an XML document's content, as distinct from a parameter entity, which is referenced in the DTD. A general entity can be a parsed entity or an unparsed entity.

That part of a DTD that is defined by references to external DTD files.

A method defined in the home interface and invoked by a client to locate an entity bean.

One of two interfaces for an enterprise bean. The home interface defines zero or more methods for managing an enterprise bean. The home interface of a session bean defines create and remove methods, whereas the home interface of an entity bean defines create, finder, and remove methods.

The international standard for country codes maintained by the International Organization for Standardization (ISO).

An object that can be used to obtain a reference to the home interface. A home handle can be serialized and written to stable storage and deserialized to obtain the reference.

A fatal error occurs in the SAX parser when a document is not well formed or otherwise cannot be processed. See also error, warning.

An authentication mechanism in which a Web container provides an application-specific form for logging in. This form of authentication uses Base64 encoding and can expose user names and passwords unless all connections are over SSL.

A concatenation of XSLT transformations in which the output of one transformation becomes the input of the next.

An entity that provides enterprise information system-specific functionality to its clients. Examples are a record or set of records in a database system, a business object in an enterprise resource planning system, and a transaction program in a transaction processing system.

An entity that exists as an external XML file, which is included in the XML document using an entity reference.

A tag that does not enclose any content.

A JAR archive that contains an EJB module.

A vendor that supplies an EJB server.

The top-level directory of a WAR. The document root is where JSP pages, client-side classes and archives, and static Web resources are stored.

In a JMS publish/subscribe messaging system, a subscription that continues to exist whether or not there is a current active subscriber object. If there is no active subscriber, the JMS provider retains the subscription's messages until they are received by the subscription or until they expire.