Meaning of ${project.basedir} in pom.xml

Question

What is the meaning of

${project.basedir}

and

${project.build.directory}

Answer 1

${project.basedir} is the root directory of your project.

${project.build.directory} is equivalent to ${project.basedir}/target

as it is defined here: https://github.com/apache/maven/blob/trunk/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.0.0.xml#L53