Defines annotations for customizing Java program elements to XML Schema mapping.

## Package Specification

The following table shows the JAXB mapping annotations that can be associated with each program element.

Program Element | JAXB annotation
Package |
XmlAccessorOrder
XmlAccessorType
XmlSchema
XmlSchemaType
XmlSchemaTypes
XmlJavaTypeAdapter
XmlJavaTypeAdapters
Class |
XmlAccessorOrder
XmlAccessorType
XmlInlineBinaryData
XmlRootElement
XmlType
XmlJavaTypeAdapter
Enum type |
XmlEnum
XmlEnumValue (enum constant only)
XmlRootElement
XmlType
XmlJavaTypeAdapter
JavaBean Property/field |
XmlElement
XmlElements
XmlElementRef
XmlElementRefs
XmlElementWrapper
XmlAnyElement
XmlAttribute
XmlAnyAttribute
XmlTransient
XmlValue
XmlID
XmlIDREF
XmlList
XmlMixed
XmlMimeType
XmlAttachmentRef
XmlInlineBinaryData
XmlElementDecl (only on method)
XmlJavaTypeAdapter
Parameter |
XmlList
XmlAttachmentRef
XmlMimeType
XmlJavaTypeAdapter

### Terminology

JavaBean property and field: For the purposes of mapping, there is no semantic difference between a field and a JavaBean property. Thus, an annotation that can be applied to a JavaBean property can always be applied to a field. Hence in the Javadoc documentation, for brevity, the term JavaBean property or property is used to mean either JavaBean property or a field. Where required, both are explicitly mentioned.

top level class: For the purpose of mapping, there is no semantic difference between a top level class and a static nested class. Thus, an annotation that can be applied to a top level class, can always be applied to a nested static class. Hence in the Javadoc documentation, for brevity, the term "top level class" or just class is used to mean either a top level class or a nested static class.

mapping annotation:A JAXB 2.0 defined program annotation based on the JSR 175 programming annotation facility.

### Common Usage Constraints

The following usage constraints are defined here since they apply to more than annotation:

- For a property, a given annotation can be applied to either read or write property but not both.
- A property name must be different from any other property name in any of the super classes of the class being mapped.
- A mapped field name or the decapitalized name of a mapped property must be unique within a class.

### Notations

Namespace prefixes

The following namespace prefixes are used in the XML Schema fragments in this package.

Prefix | Namespace | Notes
xs | http://www.w3.org/2001/XMLSchema | Namespace of XML Schema namespace
ref | http://ws-i.org/profiles/basic/1.1/xsd | Namespace for swaref schema component
xsi | http://www.w3.org/2001/XMLSchema-instance | XML Schema namespace for instances

@since JAXB 2.0