| Field | Value |
|---|
| Name | Query Expression |
| Description | This component provides a way to express queries in a generic
manner. Its centerpiece is a class called XMLQuery that uses
boolean postfix expressions to capture the domain, range, and
constraint of a query, regardless of the source of the query (SQL,
keyword query, etc.). It can also encapsulate the results of a
query. It's used by many other components as the standard way to
pass a query and its results between servers, clients, nodes, and
other components. |
| Homepage | http://oodt.apache.org/oodt-xmlquery |
