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# XML Registry --> Configuration

Tasks Related Topics Attributes

## Overview

The XML Registry is a facility for configuring and administering the XML resources of an instance of WebLogic Server. XML resources in WebLogic Server include the parser used by an application to parse XML data, the transformer used by an application to transform XML data, external entity resolution, and caching of external entities.

You can configure the following two types of entries for a given XML registry:

- to configure parsers and transformers.
- to configure external entity resolution.

Use the Configuration tab to set the DocumentBuilderFactory, SaxParserFactory, and Transformer Factory classes for a particular XML Registry. You can also override the default value of when you want WebLogic Server to cache external entities for this XML Registry. Click on the first link to configure external entity resolution and the second link to configure parsers for a particular document type.

## Tasks

Configuring a Parser or Transformer Other Than the Built-In

Configuring a Parser for a Particular Document Type

Configuring External Entity Resolution

## Related Topics

Administering WebLogic Server XML

## Attributes

Table 461-1

Attribute Label | Description | Value Constraints
--- | --- | ---
Name | The name of this configuration. WebLogic Server uses an MBean to implement and persist the configuration. MBean: `weblogic.management. configuration. XMLRegistryMBean` Attribute: `Name` |
DocumentBuilderFactory | The class name of the default DocumentBuilderFactory MBean: `weblogic.management. configuration. XMLRegistryMBean` Attribute: `DocumentBuilderFactory` | Default: "weblogic.apache.xerces.jaxp.DocumentBuilderFactoryImpl" Dynamic: yes
SAXParserFactory | The class name of the default SAXParserFactory MBean: `weblogic.management. configuration. XMLRegistryMBean` Attribute: `SAXParserFactory` | Default: "weblogic.apache.xerces.jaxp.SAXParserFactoryImpl" Dynamic: yes
Transformer Factory | The class name of the default TransformerFactory MBean: `weblogic.management. configuration. XMLRegistryMBean` Attribute: `TransformerFactory` | Default: "weblogic.apache.xalan.processor.TransformerFactoryImpl" Dynamic: yes
When To Cache | Set whether to cache items as soon as possible or wait until referenced. MBean: `weblogic.management. configuration. XMLRegistryMBean` Attribute: `WhenToCache` | Default: "cache-on-reference" Valid values: "cache-on-reference" "cache-at-initialization" "cache-never" Dynamic: yes