Clarify component scan include-filter semantics

Issue: SPR-13844

spring-context/src/main/java/org/springframework/context/annotation/ComponentScan.java

 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -127,10 +127,13 @@ public @interface ComponentScan {
 
 	/**
 	 * Specifies which types are eligible for component scanning.
-	 * <p>Further narrows the set of candidate components from everything in
-	 * {@link #basePackages} to everything in the base packages that matches
-	 * the given filter or filters.
-	 * @see #resourcePattern
+	 * <p>Further narrows the set of candidate components from everything in {@link #basePackages}
+	 * to everything in the base packages that matches the given filter or filters.
+	 * <p>Note that these filters will be applied in addition to the default filters, if specified.
+	 * Any type under the specified base packages which matches a given filter will be included,
+	 * even if it does not match the default filters (i.e. is not annotated with {@code @Component}).
+	 * @see #resourcePattern()
+	 * @see #useDefaultFilters()
 	 */
 	Filter[] includeFilters() default {};
 

spring-context/src/main/resources/org/springframework/context/config/spring-context-4.2.xsd

@@ -235,6 +235,9 @@
 					<xsd:annotation>
 						<xsd:documentation><![CDATA[
 	Controls which eligible types to include for component scanning.
+	Note that these filters will be applied in addition to the default filters, if specified.
+	Any type under the specified base packages which matches a given filter will be included,
+	even if it does not match the default filters (i.e. is not annotated with @Component).
 							]]></xsd:documentation>
 					</xsd:annotation>
 				</xsd:element>

spring-context/src/main/resources/org/springframework/context/config/spring-context-4.3.xsd

@@ -235,6 +235,9 @@
 					<xsd:annotation>
 						<xsd:documentation><![CDATA[
 	Controls which eligible types to include for component scanning.
+	Note that these filters will be applied in addition to the default filters, if specified.
+	Any type under the specified base packages which matches a given filter will be included,
+	even if it does not match the default filters (i.e. is not annotated with @Component).
 							]]></xsd:documentation>
 					</xsd:annotation>
 				</xsd:element>