return new StringBuilder(128)
            .append((getGroupId() == null) ? "[unknown-group-id]" : getGroupId())
            .append(":")
            .append((getArtifactId() == null) ? "[unknown-artifact-id]" : getArtifactId())
            .append(":")
            .append((getVersion() == null) ? "[unknown-version]" : getVersion())
            .toString();
    }

    /**