<!--
	Bean definitions can specify zero or more constructor arguments.
	This is an alternative to "autowire constructor".
	Arguments correspond to either a specific index of the constructor argument
	list or are supposed to be matched generically by type.

	Note: A single generic argument value will just be used once, rather than
	potentially matched multiple times (as of Spring 1.1).

	constructor-arg elements are also used in conjunction with the factory-method
	element to construct beans using static or instance factory methods.
-->
<!ELEMENT constructor-arg (
	description?,
	(bean | ref | idref | value | null | list | set | map | props)?
)>

<!--
	The constructor-arg tag can have an optional index attribute,
	to specify the exact index in the constructor argument list. Only needed
	to avoid ambiguities, e.g. in case of 2 arguments of the same type.
-->
<!ATTLIST constructor-arg index CDATA #IMPLIED>

<!--
	The constructor-arg tag can have an optional type attribute,
	to specify the exact type of the constructor argument. Only needed
	to avoid ambiguities, e.g. in case of 2 single argument constructors
	that can both be converted from a String.
-->
<!ATTLIST constructor-arg type CDATA #IMPLIED>

<!--
  A short-cut alternative to a child element "ref bean=".
-->
<!ATTLIST constructor-arg ref CDATA #IMPLIED>

<!--
  A short-cut alternative to a child element "value".
-->
<!ATTLIST constructor-arg value CDATA #IMPLIED>


<!--
	Bean definitions can have zero or more properties.
	Property elements correspond to JavaBean setter methods exposed
	by the bean classes. Spring supports primitives, references to other
	beans in the same or related factories, lists, maps and properties.
-->
<!ELEMENT property (
	description?, meta*,
	(bean | ref | idref | value | null | list | set | map | props)?
)>

<!--
	The property name attribute is the name of the JavaBean property.
	This follows JavaBean conventions: a name of "age" would correspond
	to setAge()/optional getAge() methods.
-->
<!ATTLIST property name CDATA #REQUIRED>

<!--
  A short-cut alternative to a child element "ref bean=".
-->
<!ATTLIST property ref CDATA #IMPLIED>

<!--
  A short-cut alternative to a child element "value".
-->
<!ATTLIST property value CDATA #IMPLIED>


<!--
	A lookup method causes the IoC container to override the given method and return
	the bean with the name given in the bean attribute. This is a form of Method Injection.
	It's particularly useful as an alternative to implementing the BeanFactoryAware
	interface, in order to be able to make getBean() calls for non-singleton instances
	at runtime. In this case, Method Injection is a less invasive alternative.
-->
<!ELEMENT lookup-method EMPTY>

<!--
	Name of a lookup method. This method should take no arguments.
-->
<!ATTLIST lookup-method name CDATA #IMPLIED>

<!--
	Name of the bean in the current or ancestor factories that the lookup method
	should resolve to. Often this bean will be a prototype, in which case the
	lookup method will return a distinct instance on every invocation. This
	is useful for single-threaded objects.
-->
<!ATTLIST lookup-method bean CDATA #IMPLIED>


<!--
	Similar to the lookup method mechanism, the replaced-method element is used to control
	IoC container method overriding: Method Injection. This mechanism allows the overriding
	of a method with arbitrary code.
-->
<!ELEMENT replaced-method (
	(arg-type)*
)>

<!--
	Name of the method whose implementation should be replaced by the IoC container.
	If this method is not overloaded, there's no need to use arg-type subelements.
	If this method is overloaded, arg-type subelements must be used for all
	override definitions for the method.
-->
<!ATTLIST replaced-method name CDATA #IMPLIED>

<!--
	Bean name of an implementation of the MethodReplacer interface in the current
	or ancestor factories. This may be a singleton or prototype bean. If it's
	a prototype, a new instance will be used for each method replacement.
	Singleton usage is the norm.
-->
<!ATTLIST replaced-method replacer CDATA #IMPLIED>

<!--
	Subelement of replaced-method identifying an argument for a replaced method
	in the event of method overloading.
-->
<!ELEMENT arg-type (#PCDATA)>

<!--
	Specification of the type of an overloaded method argument as a String.
	For convenience, this may be a substring of the FQN. E.g. all the
	following would match "java.lang.String":
	- java.lang.String
	- String
	- Str

	As the number of arguments will be checked also, this convenience can often
	be used to save typing.
-->
<!ATTLIST arg-type match CDATA #IMPLIED>


<!--
	Defines a reference to another bean in this factory or an external
	factory (parent or included factory).
-->
<!ELEMENT ref EMPTY>

<!--
	References must specify a name of the target bean.
	The "bean" attribute can reference any name from any bean in the context,
	to be checked at runtime.
	Local references, using the "local" attribute, have to use bean ids;
	they can be checked by this DTD, thus should be preferred for references
	within the same bean factory XML file.
-->
<!ATTLIST ref bean CDATA #IMPLIED>
<!ATTLIST ref local IDREF #IMPLIED>
<!ATTLIST ref parent CDATA #IMPLIED>


<!--
	Defines a string property value, which must also be the id of another
	bean in this factory or an external factory (parent or included factory).
	While a regular 'value' element could instead be used for the same effect,
	using idref in this case allows validation of local bean ids by the XML
	parser, and name completion by supporting tools.
-->
<!ELEMENT idref EMPTY>

<!--
	ID refs must specify a name of the target bean.
	The "bean" attribute can reference any name from any bean in the context,
	potentially to be checked at runtime by bean factory implementations.
	Local references, using the "local" attribute, have to use bean ids;
	they can be checked by this DTD, thus should be preferred for references
	within the same bean factory XML file.
-->
<!ATTLIST idref bean CDATA #IMPLIED>
<!ATTLIST idref local IDREF #IMPLIED>


<!--
	Contains a string representation of a property value.
	The property may be a string, or may be converted to the required
	type using the JavaBeans PropertyEditor machinery. This makes it
	possible for application developers to write custom PropertyEditor
	implementations that can convert strings to arbitrary target objects.

	Note that this is recommended for simple objects only.
	Configure more complex objects by populating JavaBean
	properties with references to other beans.
-->
<!ELEMENT value (#PCDATA)>

<!--
	The value tag can have an optional type attribute, to specify the
	exact type that the value should be converted to. Only needed
	if the type of the target property or constructor argument is
	too generic: for example, in case of a collection element.
-->
<!ATTLIST value type CDATA #IMPLIED>

<!--
	Denotes a Java null value. Necessary because an empty "value" tag
	will resolve to an empty String, which will not be resolved to a
	null value unless a special PropertyEditor does so.
-->
<!ELEMENT null (#PCDATA)>


<!--
	A list can contain multiple inner bean, ref, collection, or value elements.
	Java lists are untyped, pending generics support in Java 1.5,
	although references will be strongly typed.
	A list can also map to an array type. The necessary conversion
	is automatically performed by the BeanFactory.
-->
<!ELEMENT list (
	(bean | ref | idref | value | null | list | set | map | props)*
)>

<!--
	Enable/disable merging for collections when using parent/child beans.
-->
<!ATTLIST list merge (true | false | default) "default">

<!--
	Specify the default Java type for nested values.
-->
<!ATTLIST list value-type CDATA #IMPLIED>


<!--
	A set can contain multiple inner bean, ref, collection, or value elements.
	Java sets are untyped, pending generics support in Java 1.5,
	although references will be strongly typed.
-->
<!ELEMENT set (
	(bean | ref | idref | value | null | list | set | map | props)*
)>

<!--
	Enable/disable merging for collections when using parent/child beans.
-->
<!ATTLIST set merge (true | false | default) "default">

<!--
	Specify the default Java type for nested values.
-->
<!ATTLIST set value-type CDATA #IMPLIED>


<!--
	A Spring map is a mapping from a string key to object.
	Maps may be empty.
-->
<!ELEMENT map (
	(entry)*
)>

<!--
	Enable/disable merging for collections when using parent/child beans.
-->
<!ATTLIST map merge (true | false | default) "default">

<!--
	Specify the default Java type for nested entry keys.
-->
<!ATTLIST map key-type CDATA #IMPLIED>

<!--
	Specify the default Java type for nested entry values.
-->
<!ATTLIST map value-type CDATA #IMPLIED>

<!--
	A map entry can be an inner bean, ref, value, or collection.
	The key of the entry is given by the "key" attribute or child element.
-->
<!ELEMENT entry (
  key?,
	(bean | ref | idref | value | null | list | set | map | props)?
)>

<!--
	Each map element must specify its key as attribute or as child element.
	A key attribute is always a String value.
-->
<!ATTLIST entry key CDATA #IMPLIED>

<!--
  A short-cut alternative to a "key" element with a "ref bean=" child element.
-->
<!ATTLIST entry key-ref CDATA #IMPLIED>

<!--
  A short-cut alternative to a child element "value".
-->
<!ATTLIST entry value CDATA #IMPLIED>

<!--
  A short-cut alternative to a child element "ref bean=".
-->
<!ATTLIST entry value-ref CDATA #IMPLIED>

<!--
	A key element can contain an inner bean, ref, value, or collection.
-->
<!ELEMENT key (
	(bean | ref | idref | value | null | list | set | map | props)
)>


<!--
	Props elements differ from map elements in that values must be strings.
	Props may be empty.
-->
<!ELEMENT props (
	(prop)*
)>

<!--
	Enable/disable merging for collections when using parent/child beans.
-->
<!ATTLIST props merge (true | false | default) "default">

<!--
	Element content is the string value of the property.
	Note that whitespace is trimmed off to avoid unwanted whitespace
	caused by typical XML formatting.
-->
<!ELEMENT prop (#PCDATA)>

<!--
	Each property element must specify its key.
-->
<!ATTLIST prop key CDATA #REQUIRED>