emf/query2/project-info/overview.html - www.eclipse.org/modeling - Git at Google

 <p>The Query2 component facilitates the process of search and retrieval of emf model elements in a structured format with an additional advantage that resource loading is minimized during execution.</p>
 <p>Query2 uses an in-built index mechanism to speed up the queries.
 The indexes are build before query execution and used during query execution. The indexes can be re-used by multiple query executions.
 For majority of queries, the resources are not needed to be loaded, and hence it provide incredible improvements in terms of memory consumption.
 </p>
 <p> Query2 supports multiple ways to specify queries.
 <ol>
 <li>User can use APIs for the basic EObject based Condition objects that are used to formulate queries for EMF models.</li>
 <li>User can specify queries in SQL like syntax. e.g from Manuscript as a select a.pages where a.title = "Learning Query2"</li>
 </ol>

 </p>
	<p>The Query2 component facilitates the process of search and retrieval of emf model elements in a structured format with an additional advantage that resource loading is minimized during execution.</p>
	<p>Query2 uses an in-built index mechanism to speed up the queries.
	The indexes are build before query execution and used during query execution. The indexes can be re-used by multiple query executions.
	For majority of queries, the resources are not needed to be loaded, and hence it provide incredible improvements in terms of memory consumption.
	</p>
	<p> Query2 supports multiple ways to specify queries.
	<ol>
	<li>User can use APIs for the basic EObject based Condition objects that are used to formulate queries for EMF models.</li>
	<li>User can specify queries in SQL like syntax. e.g from Manuscript as a select a.pages where a.title = "Learning Query2"</li>
	</ol>

	</p>