${project.name}

This is the built-in property that contains the name of the project.

${project.artifactId}

This is the built-in property that contains the unique identifier of the artifact.

${project.description}

This is the built-in property that contains the description of the project.

${project.groupId}

This is the built-in property that contains the unique identifier of the group.

${project.baseUri}

This is the built-in property that contains the URI of the project.

${project.version}

This is the built-in property, equivalent to ${version}, containing the version of the project.

${project.parent.version}

${project.parent.groupId}

These are the built-in properties that contain the version or the group ID of the parent POM.

${basedir}

This is the built-in property representing the directory in which the pom.xml file is stored.

${project.build.directory}

This is a property, defined in the central Maven's POM, containing the path of the build directory. The default value is target.

${project.build.sourceDirectory}

${project.build.scriptSourceDirectory}

${project.build.testSourceDirectory}

This is a set of properties, containing the path of Java/script sources.

${project.build.outputDirectory}

${project.build.testOutputDirectory}

This is a set of properties, defined in the central Maven's POM, containing the directory in which class files are stored during the build process. The default value is target/classes.

${project.build.finalName}

This is the built-in property containing the final name of the file created when the built project is packaged.

${settings.localRepository}

This is an environment variable, containing the Maven2 installation folder.

${env.M2_HOME}

This is an environment variable containing the Maven2 installation folder.

${env.HOME}

This is the built-in property containing the user's home directory.

${env.PATH}

This is the built-in property containing the current path in which Maven is running.

${env.JAVA_HOME}

This is an environment variable specifying the path to the current JRE_HOME folder.

${ENV.*}

Through this suffix, we can access the OSes environment variables.

${settings.*}

Through this suffix, we can access the settings.xml variables.

${java.home} or ${java.version} or ${os.version} or ${user.home} or ${user.name}

The Java environment variables are accessible by Maven. Here, we report the most common Java environment's variables.