public sealed class FilterItem : IEquatable<FilterItem>| FilterItem | Filter settings for Grids and other collection constructs. |
| Accessor | Name of the property to filter on |
| Operator | Type of filter to apply |
| Parameter | Property the Accessor is bound to. |
| Value | Value to filter on |
| ValueUntil | The second value to filter on, only applied if the Operator is Range |