This reference information describes custom properties that you can specify on certain pages of the product administrative console, if you know what to specify. Custom properties enable you to change or extend configuration settings available in the administrative console.
For example, for the z/OS operating system, the application server ras.time.local custom property controls whether timestamps in the error log use the local time or the Greenwich Mean Time (GMT). By default, ras.time.local is set to false so that timestamps use the GMT. You can change the timestamps to be in local time by setting ras.time.local to true on the application server custom property page. To set the custom property, you specify both the property name ("ras.time.local") and its value ("true").
You can find out about available custom property names and values from this reference section of the information center. Additional custom properties may be documented on the Support site as resolutions to specific customer problem reports.
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entry: an exhaustive list of available custom properties. Be sure to note
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specify a particular custom property.