Set Ops

Set Ops allows infosets to be combined in different ways to produce another infoset.

You can highlight specific information within the infoset, and apply these types of set operations to infosets: union, intersection, symmetric difference, and subtraction.

Table 1. Set Operations
Operation	Description	Example
Union	A union infoset is the combination of two or more infosets: the primary infoset and the checkboxes of whatever available infoset you select.	For example, you have three infosets, two of which contain PSTs by owner and a third that contains all Exchange email. You want to combine all three infosets to make it easier to run actions on all of the data objects therein. All three infosets combine in their entirety, resulting in a new, larger infoset. The combination of the affected areas is turned gray within the interface.
Intersection	An intersected infoset is the result of two or more infosets that contain some of the same objects. This overlap, which is where identical objects are in all infosets, is called the intersection. It is this intersection that results in the new infoset.	For example, you have two custodians, each with a significant amount of data, some of which is shared. You want to ascertain which of the shared data objects are identical. In this case, you must create an intersection infoset as you want to find identical, common data objects between the two. Only the area of similarity, the gray intersection between the two white circles, is found in the new infoset.
Symmetric Difference	A symmetric difference infoset combines a primary and selected infoset and removes identical objects from them. The remaining data objects from both filtered infosets then combine to create a new infoset.	For example, you again have two custodians, each with a significant amount of shared data. You want to ascertain which of the shared data objects are not identical. In this case, you must create a symmetric difference infoset as you want to find data objects that are different between the two. Only the area of difference between the two infosets is the white intersection. This area of difference results in a new infoset of everything but the data that is shared between the two circles.
Subtraction	A subtraction infoset combines a primary and selected infoset, removes identical objects, and then subtracts the remaining objects from the primary infoset. The remainder data objects result in the subtraction infoset.	For example, you have two infosets, both of which contain similar PSTs by owner. You want to combine both infosets and retain only the unique data objects to make a new infoset. The two infosets combine, identical data objects are removed, and only the remaining objects, that area in gray, create the new infoset.

This table describes the options available for set operations for each infoset.

Table 2. Available operation infoset options and descriptions
Available Operation Infoset Option	Description
Name	The name of the infoset against which a set operation can be conducted.
Total Objects	The total number of data objects that are contained within the infoset.
Infoset Size	The size of the infoset.
Composition	The composition of the infoset, top level, or mixed level.
Created	The date and time at which the infoset was created.
Type	The type of infoset. Remember, set operations can be conducted only against user infosets. System infosets are not available in the Available Operation Infosets pane.
Search	Search for a particular infoset with the Enter terms... text box and Search.
Details	Click Details to view the Infoset Details window. Information regarding the infoset's name, description, total number of objects, number of parent and child objects, size, composition, created date and time, type, and percentage of exceptions appears.

Note: For union and intersection set operations, check boxes appear to the left of the infoset names, but for symmetric difference and subtraction operations, radio buttons appear.