A DirXML filter is primarily for controlling which object classes are synchronized and which attributes are synchronized for those object classes. Additionally, other behaviors of those classes and attributes within DirXML can be controlled through the filter.
A DirXML filter consists of a top level <filter> that contains a set of <filter-class>'s, each of which contains a set of <filter-attr>'s. The filter for a particular driver is stored in the DirXML-DriverFilter attribute on the DirXML-Driver object.
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