JsonAppend.Attr (jackson-databind 2.5.0-rc1)

```
public static @interface JsonAppend.Attr
```
Definition of a single attribute-backed property. Attribute-backed properties will be appended after regular properties in specified order, although their placement may be further changed by the usual property-ordering functionality (alphabetic sorting; explicit ordering)

Required Element Summary

Required Elements
Modifier and Type Required Element and Description

String value
Name of attribute of which value to serialize.

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element and Description
`com.fasterxml.jackson.annotation.JsonInclude.Include`	`include` When to include attribute-property.
`String`	`propName` Name to use for serializing value of the attribute; if not defined, `value()` will be used instead.
`String`	`propNamespace` Optional namespace to use; only relevant for data formats that use namespaces (like XML).
`boolean`	`required` Metadata about property, similar to `JsonProperty.required()`.

- Element Detail
  - value
```
public abstract String value
```
    Name of attribute of which value to serialize. Is also used as the name of external property to write, unless overridden by assigning a value for propName().
  - propName
```
public abstract String propName
```
    Name to use for serializing value of the attribute; if not defined, value() will be used instead.
    
    Default:
    
    ""
  - propNamespace
```
public abstract String propNamespace
```
    Optional namespace to use; only relevant for data formats that use namespaces (like XML).
    
    Default:
    
    ""
  - include
```
public abstract com.fasterxml.jackson.annotation.JsonInclude.Include include
```
    When to include attribute-property. Default value indicates that property should only be written if specified attribute has a non-null value.
    
    Default:
    
    com.fasterxml.jackson.annotation.JsonInclude.Include.NON_NULL
  - required
```
public abstract boolean required
```
    Metadata about property, similar to JsonProperty.required().
    
    Default:
    
    false

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