Apache Jackrabbit - rep.home 在哪里设置？

问：

和杰克兔一起玩。在 Linux VM 上加载教程。

试图理解配置文件，我看到（在存储库.xml中）：

<FileSystem class="org.apache.jackrabbit.core.fs.local.LocalFileSystem">
    <param name="path" value="${rep.home}/repository"/>
</FileSystem>

很简单，变量是父变量。我想弄清楚的是 rep.home 的定义在哪里？我发现它被大量使用，但无法弄清楚它在哪里设置。我有一堆存储库目录：

/home/andy/Desktop/netbeans/jackrabbit/jackrabbit/repository
/opt/jackrabbit/jackrabbit/repository
/opt/jackrabbit/jackrabbit-core/src/test/repository
/opt/jackrabbit/jackrabbit-core/target/repository
/opt/jackrabbit/jackrabbit-core/target/simple_repository
/opt/jackrabbit/jackrabbit-core/target/repository/repository
/opt/jackrabbit/jackrabbit-core/target/repository-2/repository
/opt/jackrabbit/jackrabbit-core/target/repository-factory-test/repository
/opt/jackrabbit/jackrabbit-core/target/repository-lock-test/repository
/opt/jackrabbit/jackrabbit-core/target/simple_repository/repository
/opt/jackrabbit/jackrabbit-jca/target/repository
/opt/jackrabbit/jackrabbit-jca/target/repository/repository
/opt/jackrabbit/jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/commons/repository
/opt/jackrabbit/jackrabbit-jcr-commons/target/classes/org/apache/jackrabbit/commons/repository
/opt/jackrabbit/jackrabbit-jcr-rmi/src/main/java/org/apache/jackrabbit/rmi/repository
/opt/jackrabbit/jackrabbit-jcr-rmi/target/classes/org/apache/jackrabbit/rmi/repository
/opt/jackrabbit/jackrabbit-jcr-server/target/repository
/opt/jackrabbit/jackrabbit-jcr-server/target/repository/repository
/opt/jackrabbit/jackrabbit-spi2jcr/target/repository
/opt/jackrabbit/jackrabbit-spi2jcr/target/repository/repository
/opt/jackrabbit/jackrabbit-standalone/jackrabbit/repository

我已经寻找了配置文件来设置该变量，并检查了java参数。我错过了什么？

提示/指针/RTFM 赞赏

安 迪