Searching within an Encyclopedia volume
There are two categories of Encyclopedia volume search operations:

Select operations, which retrieve items or lists of items and properties you specify in the request

Get operations, which retrieve all available properties of an item
These operations apply only to the Encyclopedia volume you specify in the TargetVolume element of the SOAP header. Identify the target Encyclopedia volume using TargetVolume and indicate the operation to use. For a Select operation, list the properties to retrieve with the item or list.
FetchHandle is available when you use the Search element of a Get or Select request. If the result set is larger than the maximum FetchSize, BIRT iHub returns a FetchHandle with the response to keep the connection open for the next group of results.