DDMSence (pronounced "dee-dee-em-Essence") is a Java API that supports the DoD Discovery Metadata Specification (DDMS). It provides a complete implementation of the DDMS specification using DDMS 2.0, 3.0, 3.1, 4.0.1, or 4.1. Validation is performed according to both the schema and the specification, and custom validation rules can be defined with ISO Schematron.
The maven-buildmetadata-plugin is a Maven 2 plugin that helps you easily add build metadata to generated archive artifacts. When a product is running on an application server, this tool can tell you which version of which artifact is currently running on that server, which artifact maps to which source code version in the SCM repository, what configuration set (including profiles and environment variables) has been used to generate the artifact, on which machine was the artifact built, and when was the artifact built. The provided metadata include SCM information, build time, operating system, Java runtime, Maven execution information, build user, build host name, and build version.
Athena Framework for Java is a full fledged enterprise object-relational mapping (ORM) framework that employs metadata as mapping configuration. It greatly simplifies Java Web application development by removing the requirement of manual mapping and manual database schema updating. In addition to features like Java object persistence, powerful EJBQL querying execution, and comprehensive code generation, Athena has built-in support for multi-tenancy, which enables developers to build cloud applications easily. Athena can be easily integrated with other libraries like Struts or Spring to provide full stacks of service.