The expressions allowed are limited to a subset of XPath 2.0, specifically those which only select the attribute axis.
表达式被限制为XPath 2.0的一个子集，特别是那些只选择属性axis的表达式。
Click the Next button to proceed to the configure services section and select the application \ axis services as shown in figure 4.
单击Next按钮以前进到配置服务部分，并选择application \ axis服务，如图4所示。
Menus are available on each axis and for dot color and size so that you can select metrics.
菜单上提供每个轴和斑点颜色和大小，以便你可以选择数据。
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