A MultiLevelConc (concordance) displays a concordance. The concordance can consist of a mixture of context slices (which are leaf nodes in a tree, and typically display one occurrence of an interesting item in context) and summary slices (which typically show a particular interesting item, and can be expanded to show either further summaries or contexts). The concordance is initialized with a list (any IList implementation)of IConcSliceInfo objects. This interface provides information to control how each slice is displayed. Some default implementations are provided in this component.