See: Description
| Class | Description | 
|---|---|
| Filter | parameter to generally reduce the size of a query result set. | 
| Options | Simple options container. | 
| Parameters | container object for  QueryParameterandFilterinstances. | 
| Period | parameter which defines the ordering as well as the start and offset for a
 List-valued result set. | 
| QueryParameter | arbitrary query parameter used by  ome.api.IQuery. | 
These parameters are not a part of the object model defined in ome.model but are necessary for defining certain requests. Instances will be sent across the wire and therefore are designed with serialization in mind.