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XMM-Newton Science Analysis System


preferences (preferences-0.7) [xmmsas_20080701_1801-8.0.0]

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Concept

In the following the notion of SAS task preference parameters is introduced. A preference parameter, like an ordinary task parameter (see documentation of package param) is a string-key/value pair through which the user controls the run time behavior of the task. Unlike the latter however, preference parameters are user-customizable, i.e., their default values can be changed by each user according to his personal preferences.

A list of preference parameters that logically belong together can be put in a preference group with a dedicated name. The name identifies the group and serves as the key of a new group preference. Please note that this is a recursive definition: A preference group is a preference parameter, so groups can contain normal parameters and other groups which in turn can contain other groups and parameters, etc. The level of nesting is a priori unlimited.