The following methods control Named Filter objects. A Named Filter is an object which has rules which it uses to "pass" some items but "fail" others.
Named Filter objects can be applied to overlays to control the visibility of the items in that overlay: only items which pass are drawn, all other items become temporarily invisible.
In addition, many SIS Desktop methods, e.g. Scan, accept a Named Filter as an argument.
There are several different types of Named Filter, which have different rules: see Filters for details.
Named Filter objects can be saved in, and loaded from, Named Object Libraries. Named Filter objects can be created, edited and set using the methods below.
||Modifies feature code information in a named feature filter.|
||Changes the values included in a named value-list filter.|
||Creates a named filter by combining two named filters using a Boolean operation.|
||Creates a named class tree filter.|
||Creates a named combined class/property filter.|
||Creates a named feature filter based on a named feature table.|
||Creates a named layer filter.|
||Creates an empty named link filter.|
||Creates a named property filter.|
||Creates an empty named value-list filter.|
||Returns a space-separated list of all of the classes in a named class tree filter, prefixed with a '+' or '-' to indicate inclusion and exclusion.|
||Gets the feature codes branching from a parent feature code in a named feature filter.|
||Returns a space-separated list of all of the feature codes in a named feature filter, prefixed with a '+' or '-' to indicate inclusion and exclusion.|
||Finds a feature table in a NOL that matches the one stored in a feature filter.|
||Returns the class of a named filter.|
||Returns a tab-separated list of all of the layers in a named layer filter, prefixed with a '+' or '-' to indicate inclusion and exclusion.|
||Returns a space-separated list of values from a named link filter.|
||Gets a copy of an overlay drawing filter.|
||Returns the expression of a named property filter.|
||Returns the property used by a named value list filter.|
||Returns a space-separated list of values from a named value list filter.|
||Adds a clause to a named combined class/property filter.|
||Applies a copy of a named filter to an overlay in the current SWD.|
||Splits a named combined filter in two new named filters, and returns the combine Boolean operation.|