Fix #732: change XmlReadFeature.AUTO_DETECT_XSI_TYPE default to true

Author: cowtowncoder

release-notes/VERSION

@@ -17,5 +17,6 @@ Version: 3.x (for earlier see VERSION-2.x)
 #727: Change `XmlWriteFeature.WRITE_NULLS_AS_XSI_NIL` default to `true`
 #728: Change `XmlWriteFeature.AUTO_DETECT_XSI_TYPE` default to `true`
 #729: Change `XmlWriteFeature.WRITE_XML_SCHEMA_CONFORMING_FLOATS` default to `true`
+#732: Change `XmlReadFeature.AUTO_DETECT_XSI_TYPE` default to `true`
 - Add `XmlMapper.shared()`
 - Minimum Java baseline: Java 17

src/main/java/tools/jackson/dataformat/xml/XmlReadFeature.java

@@ -22,9 +22,9 @@ public enum XmlReadFeature implements FormatFeature
      * usually used for Polymorphic handling where it is difficult
      * to specify proper XML Namespace for type identifier.
      *<p>
-     * Default setting is {@code false}.
+     * Default setting is {@code true} (was {@code false} in Jackson 2.x).
      */
-    AUTO_DETECT_XSI_TYPE(false),
+    AUTO_DETECT_XSI_TYPE(true),
 
     /**
      * Feature that indicates whether empty XML elements