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diff --git a/bundles/org.eclipse.equinox.p2.metadata/src/org/eclipse/equinox/p2/metadata/query/CategoryMemberQuery.java b/bundles/org.eclipse.equinox.p2.metadata/src/org/eclipse/equinox/p2/metadata/query/CategoryMemberQuery.java
new file mode 100644
index 000000000..d6324d360
--- /dev/null
+++ b/bundles/org.eclipse.equinox.p2.metadata/src/org/eclipse/equinox/p2/metadata/query/CategoryMemberQuery.java
@@ -0,0 +1,56 @@
+/*******************************************************************************
+ *  Copyright (c) 2007, 2009 IBM Corporation and others.
+ *  All rights reserved. This program and the accompanying materials
+ *  are made available under the terms of the Eclipse Public License v1.0
+ *  which accompanies this distribution, and is available at
+ *  http://www.eclipse.org/legal/epl-v10.html
+ * 
+ *  Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.equinox.p2.metadata.query;
+
+import java.util.Collection;
+import org.eclipse.equinox.internal.p2.core.helpers.CollectionUtils;
+import org.eclipse.equinox.p2.metadata.IInstallableUnit;
+import org.eclipse.equinox.p2.metadata.IRequirement;
+import org.eclipse.equinox.p2.query.MatchQuery;
+
+/**
+/**
+ * A query matching every {@link IInstallableUnit} that is a member
+ * of the specified category.
+ * 
+ * @since 2.0 
+ */
+public class CategoryMemberQuery extends MatchQuery<IInstallableUnit> {
+	private final Collection<IRequirement> required;
+
+	/**
+	 * Creates a new query that will return the members of the
+	 * given category.  If the specified {@link IInstallableUnit} 
+	 * is not a category, then no installable unit will satisfy the query. 
+	 * 
+	 * @param category The category
+	 */
+	public CategoryMemberQuery(IInstallableUnit category) {
+		if (CategoryQuery.isCategory(category))
+			this.required = category.getRequiredCapabilities();
+		else
+			this.required = CollectionUtils.emptyList();
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.eclipse.equinox.internal.provisional.p2.metadata.query.MatchQuery#isMatch(java.lang.Object)
+	 */
+	public boolean isMatch(IInstallableUnit candidate) {
+		// since a category lists its members as requirements, then meeting
+		// any requirement means the candidate is a member of the category.
+		for (IRequirement req : required) {
+			if (candidate.satisfies(req))
+				return true;
+		}
+		return false;
+	}
+}