它跟踪已经安装的软件、版本、依赖软件和与rpm相似的其他属性。
It tracks which software is installed, the versions, dependencies, and other, similar attributes like RPM.
在门户属性文件中定义的设置适用于整个安装。
The settings which are defined in the portal properties files apply for the entire installation.
每个节点通过此节点的properties属性声明当前安装的那个执行环境。
Every node declares the execution environment currently installed by way of the properties attribute of the node.
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